When I would find used Comp seaters, I would call RCBS and tell them what I needed. Working with a 6 BR seater die and swapping the "sleeve" for a 22 caliber to work with my 22 BR rounds.
Every time the questions was asked "what are you doing, changing calibers?"
Sure enough, "They're on their way at No Charge". Have NEVER been able to beat the RCBS customer service.