I'm assuming if you're from St. Louis that you've already looked into this shop.
http://www.adrenalinexxx.com/
Let me know what you've found out about them if you've talked to them, as I was considering driving down there for a tune next spring.
I live in Des Moines, Iowa and haven't seen a shop in the midwest that has tackled this before.
I've heard that the owner of this shop has a R34, so I assumed they'd be able to tune one.