Super 8 projector Repair

I have a Bauer T1S silent projector that is the most gentle- on- film
projector I have ever used. So I would like to still use it.
The projectors projects film fine but :
The projector runs very noisy with a clunking noise that does not sound very
rhythmic. You know how a loud projector ruins the film viewing experience.
I oiled the shafts I could reach and put grease on the plastic gears, but
that does not help much. Any ideas what could help? And recommendation
on any companys that may still offer service?
Thank you.