The BEST PLACE TO BUY PARTS. Is simply put, its here. We (the community) have almost everything your looking for.
NateCrisman, he has a site dsmpartout.com he's on this site, he has probably anything you need as he guts cars like its his job.
On the otherhand you have,
GarfieldWright, another member here. Has A LOT of parts you would like to fancy your taste, oh his website is TunersNation.com
Otherwise cruise our other fellow sites like, Dsmtrader.com, become a member of Dsmtuners.com.
I advise you steer clear of ebay junk, some stuff is cheaper on ebay yes, but simply put you get what you pay for.
Its a love/hate on ebay products, some people here run ebay turbos and have no problem, while others feel it safer more reliable to buy MHI (Mitsu Heavy Ind) FP,SBR, yada yada..
Hope everything looks up.