Hello Andy - Steve on this list (Ferrari328GT) told me about the Autoenginuity software and scan tool, which he has used to read 355 key engine and emission trouble codes. It apparently won't work with minor codes such as airbag, etc. After he demoed it to me on my Toyota truck, here in Phoenix, I also purchased it. The company is actually here in the Phoenix area.
The nice thing about this tool is that it also comes with software called Speedtracer, which allows you to do your own performance testing! I haven't verified if it works with a 360, but it would not surprise me, since the current engine management/emissions standard is OBD2 as on all 96 and newer cars here in the US.
So if your car has the ODB2 plug under the driver-side dash (not sure that european cars have this, but I would think so), this tool may help. Just search for Autoenginuity on Ebay.
PS - just trying to help, I'm not affiliated with this company in any way.