Modifying my Skyline... need some help

I have a 1995 GTS25t, picked it up when I lived in Japan about a year and a half ago. I live in Italy now, and I'm bringing down my Skyline for some regular maintenance and modifications. I want to change the compressor wheels on the turbo to ones that can provide better flow charictaristics, but I need to know the manufacturer... There's a big fat Nissan on the side where it should say Garret or KKK or whatever. Do any of you tech junkies know who makes the turbo for RB25DET engines? It's ECR33 vin, if that helps.

So I've got the turbo and manifold pulled off right now, the flange between them is warped and I keep blowing gaskets, so it's being machined right now. This is my second question, where can I order OEM maintenance parts for my car? I called several companies in Japan, but they all said they could only ship domestically. I will need a exhaust manifold gasket, timing tensioner, water pump, and thermostat. If anyone could link me a good site, I'd appreciate it.

Thanks a lot,
-Aaron

1995 Nissan Skyline GTS25t
Apexi Super AVCR Boost controller
Apexi AFCII
Trust Exhaust
Tein Suspension
Blitz intake
more to come...