For general kind of items (coolers, hose fittings, e-fans, switches, etc etc) Summit Racing has yet to do me wrong. They seem to have pretty competitive prices, never screw up my orders and alot of times have free shipping offers. Plus they ship Fedex, so it's possible to get your goodies delivered on Saturday.

I placed an order Wednesday afternoon, got free shipping, and Fedex tracking says it will be here tomorrow (Saturday)