I found out some interesting things today. The isuzu parts list is indeed wrong on some things. They knew about the compressor part number being incorrect. The 01 Vx AC compressor is unique to the 01Vx. The >02 isuzus use the same compressor, they have same rating and mounting but with one small but huge difference:the low suction connection on the Vx sticks out at an angle to allow the hose to not be pinched in steering components, the others are flat, so the hose has a pinch in it to get it to fit. So if you have an 01, its OEM or nothing, the clutch is the same I think, so you could try that, but for compressor failure...its gonna cost. I am keepin my old one just in case. I found a place that said they could rebuild it if you mail it to them, but its a few weeks plus shipping, so I will probably have my original rebuilt just in case. My new one came from a wrecked Vx with about 70K miles. Quality auto parts, very cool and ridiculously quick.
I hope no one else has to go through what I did...