HELP! electric window motor parts

[mk4_bandit]

I was fixing my car the other day and i was playing round with the wndow motor because it wasn't working, when i took it off some bits fell out of the motor. I got my dad too have a look and he reckons its the bushes? has anybody else had this problem before? im guessing i need too replace the bushed so does anybody know of somewere that i can get them from? If not weres the best place to get a cheap motor from?

cheers