There are no decent car yards in Perth. Fabcar is where I bought two stageas and got fully ripped off at the time. Although they dont bring anything in below grade 4.5. Regan is a good bloke, but I doubt he will deal with any silvia / 180sx. They usually stock clean V35, GTTs, elgrand, delicas, civics etc. And will not trade anything that is highly modified. I tried with my GTiR and nearly bought Jnr's stagea a while back, but I turned it down. I also have not seen a clean silvia at a yard in quite some time unless it was a S15 or varietta.
Danny, a broker at Imports 101 is where I imported my s13 (one of the first in Perth) and a RA GTiR. Importing is the way to go if you want something specific and dont mind waiting. Friendly, informative and decent after sales service, i highly recommend. Personally I would buy private because it is a buyer's market atm and silvias are dirt cheap anyways. Also consider buying interstate for the best prices. Either freight or drive back.
The address is:
1/25 Forward St
East Victoria Park WA
Phone: (08) 9355 5101
Fax: (08) 9355 5102
Mob: 0403 065 666