IHI is a japanese corporation that makes a lot of things, including turbochargers:
http://www.ihi.co.jp/en/index.html I think that they are the original manufacturers for the turbochargers used in the 3200GT
I found it by myself, due to a turbocharger failure that was not suitable for reconditioning... and after checking the Maserati price for a new one, I felt motivated (VERY motivated, I would say) to look for an alternative. I found this
http://www.turbolader.net/Turbolader-Katalog/8900-2853/585360000/VM38R.aspx and asked for a reconditioned unit or a new unit price. They quickly quoted me a new unit, available from stock, and I'm very happy with the communication with them.
I also discovered another part. My car had a missing LH reflector at the rear bumper, p/n 46426712 and although not expensive from Eurospares (approx 4 EUR - postage will be more than the double...), when walking through a car salvage yard looking for another part for a different car, I saw the remainings of a Fiat Marea and found that the bumper reflectors looked the same... so I bought both for 1 EUR... and yes, they are the same part
Here there are not too much Maserati, I think I've only saw a 4200 near Madrid not too long ago, and I've never met another 3200GT. I've notice from another forum of two other 3200GTs in Spain, but not in Madrid. Sooo... I'm afraid that there would be not too much users in a spanish Maserati forum. Also, used Maserati here are quite more expensive than in UK (well... same for Jaguars
)