Gearyr, that mount that
Bigge Al posted a link to is the early TC quick release set that had a base adapter and a spring loaded ring unit. It's a pretty heavy and bulky (to me) contraption. Although I must say it works and is built like a tank.
If you want a lighter trimmer unit, you want the simple flat base and rings.
I've acquired two types.
One accepts Weaver style rings (first three pictures below). I bought mine from Fox Ridge. They had two different models, one for the Renegade and one for the Hawken, and were around $30. But Fox Ridge closed up shop about a year ago. The last time I checked with TC they had a scope base made for their octagon barrels, it's part #9953. They say it fits both the Renegade and Hawken models, but I would double check that. They were $44.50 plus shipping, and could be ordered by phone from TC Customer Service at (603)-330-5659.
The other is the old #9930 base sold by TC (second three pictures below) I bought one from a forum member. The 9930 fits my 1" barrel. I'm not sure if there was a different number for 15/16" barrels.
Both are mounted using the two screw holes for the TC rear sight and a third hole in the breech plug that's filled with a blind screw. Some TC barrels don't have that third hole. If not, it has to be drilled and tapped. But that's a simple job.
Also, if you call TC and ask they will send you an offset hammer at no charge - at least they did for me. You may not need the offset hammer, depending on what scope you use, how big the ocular bell is, how high your rings are, and how far back the scope is positioned in the mounts.
Sorry about the picture quality. I took them indoors just now with a flash. Were it daylight outside I could probably have gotten better definition outdoors.