JMK! (speaking of North of the 49th).
Delyk has some interesting projects in smaller sized enclosures, including 1590A and 1590LB! So I got a few and Delyk was great to deal with.
Peper's Pedals — who pioneered the Rocket-Sockets (Nylon Nut Drivers) many here use. (NB! single "p" in the middle, not "pepper".) AHHH
Alas... Looks like Peper doesn't offer PCBs anymore
GCI for some bombastic circs. Surprised nobody singled that one out.
NOT my preferred style, but I've got a few:
General Guitar Gadgets PCBs,
Small Bear bits,
Other potential explorations...
TonePad — one of the originals in the supplier game,
Oshpark
Rullywow
uk-electronic.de
Muzique / AMZ
Tayda
Musikding
PigeonFX
THCustom
DIYGuitarpedals.com.au
Coda
Music From Outer Space
guitar-electronics.eu (Polish Co's w/ English-lang site)
OP Electronics (Italian)
DIYpedalgearparts (Italian)
EffectPedalKits (and PCBs)
Don't know anyone who uses these:
Jed's Peds (large selection, but ... anyone have these PCBs?)
Big Dipper (currently NOT offering DIY PCBs)
StewMac (actually, I do know Fig bought a kit from here — and he probably paid too much!)
RIP
Grind Custom
Stomptown
VIPFX
Mammoth
3PDT (still supplying parts on Amazon, but no more PCBs).