If they had a system like that when I bought my 9mm suppressor, that is what I would have done. Not a big enough deal for me to get a .45 can, nor get my 9mm can rebuilt for both.

To be honest, if I was starting "new" with cans today, I would not buy a .22 or pistol can, I would make my own and go the Form 1 route. For rifle, I might still buy one.