Due to the rare bolt pattern they are hader to find.
The largest tire/wheel combination that will fit is the stock V8 setup, but just barely and likely not with spacers.

PUK, AND R&B Tuning out of Germany carry the spacers

 

I just had a set of 15mm hub centric spacers machined at a shop in Victoria, they did a beautiful job. I know a guy in Calgary with a machine shop that is exceptionally talented as well. PM me if you want a contact.

Jeff

 

There are multiple places that can make custom spacers. Motorsports tech is one famous one, but there are many smaller places that make them as well. I have a friend that makes them for me for very cheap, usually about $150 for a set of 4.

 

If wheel spacers you are needed, I recommend the BONOSS and H&R wheel spacers, they are AWESOME.

 

When using wheel spacers make sure the bolts will be long enough, you may have to get longer ones. The other alternative is to get rims with a different offset.
David Teitelbaum