Some more options, full disclosure I run 10-32 Solutions, so one of them is the carbine classes I run. I'm on the WI/MN border and frequently partner up with Milwaukee COPS to run classes down SE/WI way. However, I am able to travel to ND/SD if you've got a range and enough people for a class to make the logistics easier for you guys. Another option are the guys at Timm Training/Patrol Tactical. They are LEO's based out of central MN in the Brainerd area, and not only occasionally run their own classes but they host other instructors there as well. In the past they've had Trident Concepts, Vickers, Awerbuck, and I believe this year they've got Awerbuck again and Spaulding with Handgun Concepts.
The guys at Timm Training are LEO's that are also involved with 3-Gun and the Huldra rifles. Myself, I'm a 20-yr sworn Patrol and SWAT cop that's certified through my state DOJ as a Firearms Instructor, Active Shooter Instructor, and as a Rifle Instructor. I'm known for working with carbines amongst the LE in my area and I've also written articles on them for SWAT Magazine.
I hope either of these are of use, and even if you prefer some other form of training, let me know as I can point you in some directions for quality instructors. I believe there are AAR's for both companies here on Ar15.com. Disclosure again, one of them is one I wrote on Timm Training's Carbine course as a neutral and impartial class audit. My recommendations on them are based on my experiences with their instruction and no other reasons.
10-32 Solutions
Timm Training