If its from a Z32 then its actually smaller than those found on SR's & even CA's.
This is what you have
Turbo: T25/T2 Hybrid
Car of origin: Z32 300ZX
Engine: VG30DETT
Flange: 4 bolt
Max power: 130kW
Max boost: 1.0 bar
Housing sizes: Exhaust 0.48 AR, compressor 0.49 AR
Comments: The 4 bolt flange will fit most Nissan 4 cylinder turbo manifolds. It’s a very small & reasonably inefficient turbo & should only really be considered for replacing a failed unit.
They also have their roots in the ET Pulsar & in the TT 300ZX’s all the way up to their last release in 2000. They do have a steel wheeled compressor.
This is what you were after
Turbo: VG series
Car of origin: Gloria, Z31 300ZX
Engine: VG30DET
Flange: 4 bolt T3 style
Max power: Approx 195kW
Max boost: 1.2 bar
Housing sizes: AR not identified
Comments: These have a slightly larger exhaust housing than the turbos on the RB25’s, but have a marginally smaller compressor with different trim. These turbos are a ball bearing core with a steel compressor wheel. No ceramics here! They should be cheaper than the RB turbos & are suitable for RB20’s, SR’s & CA’s
Point of interest also, the VG series turbo never had T25 stamped into it & the same goes with AR ratios
This info & more can be found @ www.thecarscene.com
Sorry to hear about this, its not good at all. I hope things can be worked out.
James