Index by Manufacturer - others to follow as needed.
FlukeFoot 5200A Calibrator Foot
The DefPom ThingiverseFoot Side Clip and rubber, suits 5440B/510x/850x and others?
Beanflying Link to this threadFoot Rear suits 8505A or 8506A part #645945
Pigrew ThingiverseVarious from a Yeggi Site search
https://www.yeggi.com/q/fluke/Hewlett PackardAdapter IR adapter Handheld Agilent/Keysight meters
https://www.thingiverse.com/thing:2596378Bezel Analogue Meter Power Supplies suits ?
https://www.thingiverse.com/thing:225449Bezel Rear to suit 34401A and maybe other similar cases
https://www.thingiverse.com/thing:2186112Bezel CRT and Switch to suit 8753C VNA
Hendorog Thingyverse listed as a WIP
Button Power and extension to suit E3631A and maybe others?
https://www.thingiverse.com/thing:1829229Button Power suits 3478A and maybe others
kirill_ka Forum link hereButton Power suits 8640B + others
https://www.thingiverse.com/thing:2780202Cover System Power Supplies rear Outlet
https://www.thingiverse.com/thing:2476186Cover HP909 A C & E rear outlet termination
https://www.thingiverse.com/thing:2813343Foot Clip in suits a wide range of Gear
The DefPom Thingiverse &
https://www.thingiverse.com/thing:2332520Foot, Suits 5300A &B and other Aluminium Diecast Cases
Beanflying link to this threadFoot, Suits 34702A, 5300A & B and other Aluminium Cases
VK5RC's take on the foot aboveFoot, Rear 8565A spectrum analyzer should suit others
https://www.thingiverse.com/thing:2492594Foot, Rear part number 5041-8821 / 5040-7221 older Spec Analyzers and others
TerrorOperative ThingiverseFoot, Front and Rear to suit 8590 Spectrum Analyser and maybe others
Bicurico link to this threadFoot, Generic 40mm long cord wrap replacement for older HP 17XX scopes and other equipment.
Beanflying link to this threadFoot, Generic 35mm long cord wrap replacement for older HP 17XX scopes and other equipment. (correct length)
Beanflying link to this threadFoot, Snap in to suit 3458B and others
CatilinaWOW link to this threadFrame Clip and PCB mount, suits 5300A and 5300B based measuring systems
Beanflying link to this threadKnob 1/4" Plain shaft with CAD files via link. Details here
Beanflying link to this threadKnob 1/4" Plain shaft with Cad Files via link. Tweaked version of one line up!
Beanflying link to this threadKnob 1/4" Push on simple HP'ish style by JohnPi
https://www.thingiverse.com/thing:3546393Panel LAN outlet for DSO2000/3000 Scopes
https://www.thingiverse.com/thing:2594001Panel Support Input Assembly 3403C
https://www.thingiverse.com/thing:1886419 PCB Card Lever Suits older Card based equipment (4261A + others)
The DefPom - ThiniverseVarious from a Yeggi Site search (sorry lots of NON Test gear too)
https://www.yeggi.com/q/hewlett+packard/Wheel/Knob Logic Analyzers DaJMasta
https://www.thingiverse.com/thing:347147982143A Thermal printer parts
VK5RC link to this threadKeithleyFoot suits 2xxx series gear
Pigrew ThingiverseLeCroyFoot, Extra Rubber Foot Bumper for Wavepro/Master and multiple other models DaJmasta
https://www.thingiverse.com/thing:3437386Foot, Rear Wavepro/Master with rubber insert DaJMasta
https://www.thingiverse.com/thing:3437363Various from a Yeggi Site search
https://www.yeggi.com/q/lecroy/Racal-DanaButton Numerical Keyboard set suits some Counters
Pigrew ThingiverseRhode & ShwarzFoot, Extra Rubber Foot Bumper for multiple models DaJMasta
https://www.thingiverse.com/thing:3453904Knob, Encoder suits CMU2000 & CRTU
Bucurico link to this threadStanford Research SystemsButton, Power for SR560 Pre Amp DaJMasta may suit others
https://www.thingiverse.com/thing:3463854Bezel, Front for SR560 Pre Amp DaJMasta
https://www.thingiverse.com/thing:3463843TektronixClip, Plugin pull tab suits TM503 and others?
CatilinaWOW and again a few posts laterFoot, Rear Cable Wrap Suits 500 Mainframes and 400 series Scopes
Rerouter link to this threadKnob, Vertical Gain extension to suit SC504
CatilinaWOW link to this thread Link to filesVarious from a Yeggi site search
https://www.yeggi.com/q/tektronix/?s=ttValhallaFoot Rear suits 2703 AC Calibrator
The DefPom ThingiverseHandle Front suits 2703 AC Calibrator
The DefPom ThingiverseNon Brand Specific designs121GW Bumper Hangers - Magnetic and Webbing
Beanflying link to this thread121GW Tilting Bail extension
Chlor link to ThingiverseAnti Vibration Fan Gaskets - various sizes (TPU or similar flexible filament)
DaJMasta ThingiverseXantrex power supply Button - Power may suit others too
salvagedcircuitry link to this thread