How about a light but rigid Isolation platfrom made from something like a thick Polystyrene Block, floating on top of a tank of fluid, you could embed the magnets into the sides of the floating platform and have either repelling ,or attracting magnets keeping the float in place , adequate damping would depend on the strength of the magnets and the visosity of the fluid.

You also wouldn't need an awful lt of fluid , obviuosly depending on how much the displacement was. I'm not talking about a 50 Gallon drum of water- but it would probably work  

My own personal take on all of this is that the only component i have ever discovered a noticable difference of importance of the support is with record players. My LP12 is currently on the top shelf of a floor mounted rack and is sub-optimal' to say the least, cant wait to find the time to re-mount my wall shelf.

 My Compact disc player and Amplifiers seem to sound the same to me whether they are on the rack , or just sitting on the carpet on the floor,  just being honest here BTW.