I just noticed Dakota Munitions for the first time, after seeing their headstamp on some 9mm brass in an image of a loaded Elite Tactical Systems 40rd 9mm MP5 magazine at HKparts. Dakotas website shows headstamps for at least 9mm and .45acp.
and I found a .380 headstamp on an archived version of the website
Dakota Munitions has been around selling ammo since 2016 it seems.