wheel compatabily for 7J 17 ET50

For decades "The Hollander Interchange Manual" has been the bible for salvaged auto parts. It has two sections, the first section designates a unique Hollander part number for a specific part. The second section lists all the vehicles that use the same part number. They are now available electronically, they are not inexpensive. Most reputable recycle centers will inform you what models and years you can use if you are picking your own parts.

As mentioned in in Sam's answer in this thread Bolt pattern equivalency reference, you can use a clumsier (but less expensive!) alternative by looking up individual wheels on Wheelfitment.eu