Dear JCaudio
Go to the website www.gruvglide.com. They list several well regarded vendors as well as factory direct info. I usually buy mine from Elusive Disc, Music Direct, or Needle Doctor depending on what else I'm buying. They usually give you a slightly lower price than some of the high end shops.
It's great stuff. You can also access it from the manufacturers index right here on Audiogon, under G.
Best Regards & Happy Listening