Sanden SD7V16: AC Compressor Repair

hello!
I drive a Passat, manufactured in 1994, and it has a gas system installed.
My problem is that the air conditioning compressor (Sanden SD7V16) is making an excessive amount of noise!
I guess the bearings are broken!
I took it apart once, and disassembled it, but you can't see anything obvious at first glance! (It might be a piston seizure or something like that.)
A new compressor is too expensive for my car! That's why...
Does anyone know if there is a repair kit available??? And if so, where can I find it??? (seals, bearings, etc.)

'Thank you!'

MFG -={(MR)}=-