I've had some luck with a supplier named: Del City 2101 w. Camden Rd., Milwaukee, WI 53209-9848 1-800-654-4757
(
www.delcity.net)
All electrical related items. I believe there is a $25 minimum order point. You can buy small quanitities. I.E.: connectors, clamps, loom, speciality cable ties, terminals, strain reliefs, grommets, switches, terminals strips, fuse blocks,....you get the idea. They sent me a nice 300 page glossy catalog.
Hope this helps someone.