There are quite a number of companies around, meanwhile, offering more or less effective solutions (philosophies, one is inclined to say). My own first choice would be one of the custom made series by Silent Running Audio, perfectly adapted to the weight distribution of your turntable. Price tags of the VR Series would still seem to stand in an acceptable relation, otherwise there is the more affordable (non-custom) TremorLess series. Have a chat with them. Otherwise, should you happen to reside in Europe, I have good experience with SSC products from Germany. I have no idea whether these are distributed in the US, though.
http;//www.silentrunningaudio.com
http://www.hifi-scc.de
http;//www.silentrunningaudio.com
http://www.hifi-scc.de