GAL Gage will get you the basic specialty tools like fillet gages, V-wac, Cambridge, radius gages, etc. They make good tools and seem to be cheaper than buying from the catalogs, if you go direct. As long as you are buying GAL items. There is somewhat cheaper stuff out there, but you get what you pay for.
Remember-you have to be right when inspecting.
MSCDirect will get you the generic stuff-scales (rulers), dial calipers, micrometers, magnifiers, scribers/picks, tapes, soapstone, markers tempsticks and the like.
Other choices for generic might be Enco (part of MSC as I am told) J&L Industrial, McMaster-Carr, Graingers, and many others.
Buy what you need. Do not scrimp on your inspection tools. For the most part, you only have to buy them once.
Keep in mind, too, that your reputation may depend on those tools as well.
Good Luck
brande