Autozone, Pep Boys, O'Reilly, Advanced, NAPA, Carquest, National, Federated, Fleet Pride, Truck Pro, Tractor Supply Company, Walmart (sometimes), K-mart (sometimes), "Horror Fright" (Harbor Freight, really low end junk), Northern Tool (expensive version of Harbor Freight)...
Bike specific sources? Motion Pro, K&L Supply, local Honda or Yamaha dealership (who both can also get valve wrench/screwdriver combos), Cycle Gear (make them open a paper catalog), Western Power Sports, Drag Specialties, Custom Chrome, J&P Cycles...
I used to be in the bike industry and own a LOT of "obsolete" farm machinery (and 2 1990s Suzukis and 2 OLD Hondas). Oddball tools aren't that odd at my place.