https://www.facebook.com/groups/TypewriterCollectors/posts/10163311006014678/

Some interesting 3-D printing advice for replacement typewriter feet here.

Zach Hubbird recommends using a filament dryer and Shore A 85 (or lower) TPU from Siraya Tech as 95A isn't great. Many feel that 95A isn't as "grippy".

Erik Bruchez also recommends 85A while Marty Morren suggests 70A and is contemplating sourcing 60A in the future.