Been several years since I've been there. Surplus nuts, bolts, fittings, clecos, tools, metal, etc. a lot of it aircraft or military surplus. You need a chunk of 6" thick aluminum, they got it, aluminum sheet discolored by water, they got it. Nuts and bolts, etc. were $3.00 a pound. I bought .5" ss Dzus buttons for $3.00 lb, 5/16 double action SS pit pins for $.25 each. You get the Idea.
Neil, sounds like some of the places you've shopped.
Ron