Those wheels are from either a 968 or a later 928 with the front wheels being 17x7.5 ET65. They're kind of hard to find. Most Cup II front wheels are 17x7 ET55.
If you pass on that set, please PM me a contact for them.
Or, if you buy them, I'll send you a nice set of 17x7 ET55 fronts for a swap and some $$$ to make the deal worth your time.