Try http://www.lastfactory.com/.

"The LAST Factory" [cleaners & preservatives] product has been around
for many years, and many audiophiles swear by it.  We have used it on
several older LPs, and it does seem to take away some of the noise.
Major scratches it can't repair, of course.  The company also has
several other products designed to preserve vinyl records.

Dale Dohler