I managed to lose the shell holder retainer (snap ring that fits in the top of the ram) on my T-7. Searched my place, couldn't find it. Searched the Mighty InterWeb, couldn't find a replacement. Tried a few homemade items, no luck. Also didn't have any luck adapting anything else, like C-clips and such. I got close a few times but not close enough.
Emailed Redding Tuesday, got a reply yesterday, apparently these guys worked on the 4th! One is on it's way to me, no charge.