They do look nice, as for fitment I never heard of it being done, you will need to check the offset and pcd, ask the guys at gwent vw they will know.If not, I'm sure that a good machinist could knock an adapter up
About the corvette wheels 2 cars have had them on in PVW and apparently adapters were 36mm(f) and 40mm(r) but thats all they said. I think wheelbasedirect.co.uk do some porsche replica "cup turbo" alloys so would go straight on.