Yea I caught onto this back in December and found a dealer here in Ohio. They had decent stock of the more popular cans for MP5s but I wanted a SD can. It took a little longer to make it to Ohio than I was thinking but I did get my Form 4s filed on April 3rd. Mine is marked B&T and MP5-SD.
I would be interested in a Rotex V but my understanding is that this is a 2018 proposition at best. I might be interested in a Impuls IIA too. It would be nice to include "for H&K" markings too.