HK 3 lug adapter in the Twin Cities?

[Bitter Bastard]

Does anyone know of a Twin Cities store that has 1/2 x 28 to HK 3 lug adapters in stock? I think the one I currently have is slightly out of spec but it might be the adapter on the suppressor as well. I'd like to find one in person I can try with my can if possible.

Thanks,

Bitter Bastard