Enclosure Manufacturers

Serpac Allows custom tooling.
Axxatronic
Boss
BOPLA
Box Clever
Box Enclosures
Bud Industries
Changhe Enclosures
Engineering (extrusions)
Diptal
Envision Plastics & Design
Eurobox Enclosures
EvatronCheap plastic and extruded ali cases
Fischer Elektronik
Gainta
Hammond Manufacturing Allows custom tooling. Includes the old Ritec brand. Mostly Canadian manufactured. ([1])
Industrial Enclosures
Italtronic
LMB Heeger
Lincoln Binns
Metcase
Multi-box
New Age Enclosures
OKW
Pactec
Perancea
Enclosures Polycase
Retex
Ritec
Rolec Good for unusual-sized diecast boxes
Rose
Serpac
Simco
Strapubox
Supertronic
Takachi
Teko
UniBox