I've used a place called "Interior Wheel" here in BC a couple times now. Guy specializes ONLY in aluminum wheels. He's got it down to a science so there's little time wasted. Reasonably affordable too.
A set of wheels is about $1200 canadian. He did a set of slots that are now on my truck, and a set of Daytona Crabs that are a few years old now and JUST starting to show signs of clearcoat failure.

So, I'd use him again if I ever find a set of the 5-Star AMC aluminum wheels.