CALL, don't email, Duane Goldman (The Disc Doctor). He may have some suggestions and might be willing to mix up some special cleaner to address your special cleaning needs. He has been studying record cleaning for probably 40 years, I doubt there is a better source on the planet.
Worst case, he might give you some advice or steer you in the right direction.
Worst case, he might give you some advice or steer you in the right direction.