I did a bit googling. This guys blog from Springfield apparently repairs typewriters, http://ibmselectric.blogspot.com/2019/07/springfield-mo-typewriter-repair.html

And as weird as it sounds you might talk to some sewing shops with in store repair guys. When I worked at one the repair guy was actually a retired machinist who could fix just about anything. Speaking of which some machinists shops might be good to call. Good Luck!