what are these???

and where can I find them?

Those are Neez Model 15 wheels. I believe IND once got some for the Atlantis Metallic M3.

Here's the IND thread of the car with the wheels. You'll want to be sitting down when they tell you the cost.
http://www.m3post.com/forums/showpost.php?p=7615676&postcount=4

calintexas wrote

You'll want to be sitting down when they tell you the cost.

Still like my stock 19s better . They should at least be lighter than stock 19s .

elp_jc wrote

Still like my stock 19s better . They should at least be lighter than stock 19s .

They don't excite me either. At least the buyer is getting a really well made and engineered wheel with his bling in this case.