I have two players I would love to have back in working condition again:

- Aiwa HS-JX705

- Sony WM-FX553

Both are in very good electronic condition but the belt has deteriorated to the point where it can barely REV/FW/PLAY the cassette. Where can I get replacement belts for either?

The belts are generally long and super-thin (think 1mm or thinner) given the slim-size of these players.