Thank you, Dewey, for the board set. Much appreciated.
For others that come along: expect to spend around $600 USD (2024) on the total project.
I have shopped, and shopped, and shopped for the required parts.
Ultimately I ended up with $95 in parts at Newark and most of the rest at Digikey. This maddening effort saved me around $85 USD in the end.
Absolutely do not buy the 6 banana jacks at Digikey @ $6/ea. Newark has them at $2/pc.
Even with the separate shipping you come out way ahead!
Newark also has some of the expensive switches/etc for a fair amount less:
SP3T switch M2024SS1W03:
Newark has 5 in stock with more expected Dec 2024. Digikey has zero and lists it as obsolete
M2024SS1W03-BA is an equivalent, with just a plastic/rubber bat hat as the only difference.
It is also discontinued; As of July 20, 2024 Digikey has 13 left in stock. Newark lists it as NLA.
This SP3T has been surprisingly difficult to match.
Rotary switch MRA112 is obsolete, limited stock..Digikey has 120 as of July 20, 2024.
MRAN112 seems to be a new replacement. I cannot confirm.
Newark has the rotary switch 51P22-01-1-16N for about $8 or so less than everybody else
Newark had the better prices on 1 or 2 of the transformers.
There were a few others that stood out, but you get the idea.
As for the special 5 row test sockets --- good luck. The Aliexpress link in the BOM seems to be the only option
EDIT to add:
I can't stress this enough, but don't waste your money, patience, or time on P1 & P2 on the front panel. These are an abortion that will not accept anything put the stiffest of wire with far too much effort.
Just avoid the expense and headache and solder your wires direct to the board. I wish I had.
Found on the Front panel BOM:
Amphenol NQ0321100000G, Digikey 609-5214-1-ND
ALL OF THIS and more has been fixed in the BOMs, with more that has been fixed and more coming.
Front board BOM has some gotchas with the Digikey part numbers
Digi-reel part numbers instead of cut tape, which adds $7 to the cost of each
line 53:
$7.10 vs $0.10
2019-RK73H2ATTD2051FDKR-ND ----> 2019-RK73H2ATTD2051FCT-ND
line 59:
$7.10 vs $0.10
2019-RK73H2ATTD2493FDKR-ND ----> 2019-RK73H2ATTD2493FCT-ND
line 61:
$7.93 vs $0.93
497-14376-6-ND ----> 497-14376-1-ND