www.porkchopbmx.com and
www.bmxguru.com The other places I look for my old school parts are the classified section of bmxmuseum, craigslist, letgo (theres a ton here, but their search engine logic BLOWS. if you type in 'bmx' youll get EVERYthing with those letters in them. to pare it down is impossible) and Ebay.
Alansbmx in the UK used to have a BOATLOAD of old 80's crap on there but it's been long sold, since I think 05. They still have some stuff pop up from time to time.