uncle albert, if you just want to search for an existing T/C barrel, I don't want to distract you from that! T/C listed two 10mm barrels from 1989 to 1992. They were the No. 4528 that I mentioned earlier, a 14" Super, and No. 4254, a 10" bull barrel with sights. They also made a small run (116 barrels) in 6-1/2" bull with sights in 1992, specifically for the Thompson/Center Association, the collectors association for T/C products. I don't have a model number handy for that one, but I might be able to find it on the box if you really want it.
The Thompson/Center Custom Shop at one time listed barrels in 10mm in lengths of 9", 12", 15", 18" and 21". I would guess that all of those are still available on special order.
One of the interesting things about T/C is they seem to have made a lot of barrels that were never catalogued. That just adds to the interest in finding something unusual.
If you want to take the "easy" way out and order a barrel from T/C, that is fairly easy to do.
The web site for T/C is:
The Custom Shop is:
E. Arthur Brown Company also sells Contender (and Encore) barrels from the Custom Shop:
Have fun in your search, but check back in and let us know what you decided to buy, and how it shoots!
OOPS! I got the model number of the 10" barrel wrong. Fixed now.