When I got my 501, back around 15 years ago, Dynavector did not stock hardly any parts for their older arms. I haven't even checked with them, if they didn't have parts that long ago, I wouldn't think they would have them now. Maybe I'm wrong, though.
Lewm, I did find an outfit in Clackamas Ore. that does tonearm repair work, I don't know the guy's name, but the business is called Inner Sound. I can't reach them until Tuesday, I guess I'll just have to hang on to my shorts until then.
Thanks and regards,
Dan