If you're ordering a bunch of different screws, I usually use these guys:
http://rtlfasteners.com/RC/index.html
Good stuff. Black like Traxxas screws, but not as expensive as your LHS. Have locknuts too (which my LHS never seeme to have in stock). You could also get a kit for your specific vehicle from eBay, but the one time I did that, I found the screws stripped easily (the hex head part).