Only 10 years old? The deck was probably by an OEM. The same drive probably was used in other singles or boomboxes. You might try MCM, Newark's sibling distributor for the repair trade.
I still use cassettes to record radio programs, which results in a hobby of repairing cheap chinese walkman players and shoebox recorders. They all have the same guts (a lot of them are built in the same factory or at least the same town). They all use variants of the same Japanese company's single chip design, use the same motor, and drive mechanics.
Mark Zenier snipped-for-privacy@eskimo.com Googleproofaddress(account:mzenier provider:eskimo domain:com)