As of the most recent Torch, there are several chapters in that area:
Minneapolis
Alpha Epsilon
Alpha Zeta
Xi Gamma
Preceptor Zeta
Preceptor Alpha Alpha
Laureate Iota
Laureate Mu
Beta Master
St. Paul
Xi Alpha Rho
Preceptor Alpha Eta
Laureate Beta
Delta Master
As usual, I can't find any websites for these chapters, so you'll have to wait for Intl. in order to get contact info for them.
Hope this helps.