Minnesota has two. I only know because I checked as well. I absolutely in no way can vouch for anything their website or techs say. That said, I've already considered both but haven't made contact.

One is DB Performance in Rogers. The other is in Elk River called HighTech Performance or something like that, iirc. Just checked, its HiTech Motorsport in Elk River.

I'm interested to know any results.