Thanks for your response. I didn’t think about the pad coming off of a cassette.
You might check and search for an answer at
https://beolover.blogspot.com
You might take a look at https://beolover.blogspot.com/search?q=beomaster+4400
Scroll down and this may have the information you are looking for.
There are Service manuals available for the Beogram 5500. Service manuals are available for downloading if you are a silver or gold level member.
This may provide the answer to your questions.
This is from the Beomaster 3300 Service Manual. Hope it helps.
I don’t know how much “crazy expensive” is, but you might find the information and available services with:
https://www.sound-smith.com/lookup/bo-cartridges/136
or
https://www.tonabnehmerservice.de/en/Retipping-of-MM-and-MC-cartridges/
Check with Steve at https://soundsheavenly.com
Only one place for quality and reliable replacements: https://www.beoparts-shop.com
Check with:
https://soundsheavenly.com
Is this what you are looking for?
https://www.beoparts-shop.com/product/beocord-2000-3300-5000-beocenter-2200-tapedeck-idler-wheel-rubber-set/