Hi, I have gotten catalogs from cars inc. and lmc- Long motor company, and have had pretty good luck with parts from these places. I have gotten dash pads, glove box inserts, window regulators , carpet and other items for the outside like marker lens and roll pans and such, also. Prices seemed to be pretty much in line with others I've looked at, too. You can request free cats from there website. Hope you can find the stuff you are looking for. burr.
p.s.- run search for chevy truck restoratio parts and come up with more sites, I'm sure.