Dave Giles wrote:

CPC might be able to help out - they're at http://cpc.farnell.com. I did a
quick search on Aiwa and there appear to be quite a few tape-deck-related
bits (belts, capstans, pinch wheels, motors, etc). The only issue is -
which one. (there may be a drive model number stamped on the deck
mechanism)

Ok - a quick follow up. Check out http://www.partstore.com - it's a US site,
but they've got a good parts search engine (by make then model); very neat,
and very handy for getting the part numbers for the belts...

Hth,
Dave