kovz
+1y
I concur with mazdizzle. Modplant is a good one. And Thorbreck brothers (aka suicide doors) has everything you will need, but sometimes shipping sucks from them.
Airedup.com has a good selection of fittings.
I've bought lots of air management stuff from newmaticsinc.com as well.
I had a professional machinist that specializes in narrowing rears narrow mine for $490. He also putting an RX7 diff in it for Limited Slip.