This page is for vendors that mostly sell discrete components although others have crept in here, too.
Accutronics and Belton Reverb Tanks
Accutronic Reverb Tank Numbering System
Belton Engineering Co. LTD – Reverb Tanks
Consolidated Electronics – wire
e-P Board design – SOIC, SOP -> DIP
PLC Center 2N5138 possible source
Profusion Audio Semiconductors
Profusion Reverb and Effects Components
State Electronics – Potentiometers
Robin Whittle – 3.5mm mono vertical mount PCB sockets
Semiconductor Technology, Inc.
Trendsetter Electronics (source for Linear Systems components)
UT Source (source for NOS chips)