RCA late 60's/early 70's console stereo

[mocom70]

I picked up a nice unit at a community sale, cabinet in good condition, everything works great. The controls needed a squirt of contact cleaner, though. My issue is the RCA tone arm. This is the arm with the little square of felt(?) on the end bottom. The cloth or felt is missing and the arm lays on the record with no protection. Is there anywhere you can get this material or is there something I can attach so I can use the turntable? I had the same set up on an RCA portable unit I had when I was a teenager. Any thoughts would be appreciated.