There are so many options and so many opinions that you really have to try a few possibilities for yourself: Herbie's Big Fat Dots, DIY Sorbothane discs (from material purchased through McMaster.com), Nimbus couplers, Grand Prix Audio Apex footers, Aurios, ArtGum Erasers...the list gets pretty long.
BTW, I thought Sound Anchor supplied coupling discs of some sort? Maybe I heard this wrong or I'm thinking of another manufacturer.
BTW, I thought Sound Anchor supplied coupling discs of some sort? Maybe I heard this wrong or I'm thinking of another manufacturer.

