32 WCF Chamber Reamer|Restoration, Repair and Maintenance|Forum|Winchester Collector

I discovered a rough chamber in my .32-20 1873 when I took it to the range to test fire.

After examining it with a borescope it appears as if someone dug out a stuck case with a screwdriver and significantly burred the chamber walls.

So, now I am looking for a .32-20 finish reamer to borrow or rent to clean it up a bit before polishing the chamber.  I would prefer not to spend the $125 on a new reamer if possible.

Does anyone know of a source?

Thanks!