I don’t know who the manufacturer is but would more than likely be less than a slim chance of finding a barrel replacement. I noticed that you posted on the making parts forum here at https://clockrepairtips.com/forum/viewtopic.php?f=7&t=2334 also so I’ll post on that forum too. I think our moderator William (Willofiam) does tooth repair as well as fabrication of entire barrels and wheels when needed. I know he has a website for contacting him but don’t remember it just now. I’ll try to find it for you online and will post it in the other forum if I find it.
Good luck, Dan