Good news! Glad to be of some help. Now...onwards. In terms of further isolation (it does NOT always work)...you have to experiment. You have 3 basic options:
1. Nearly free...some people 'float' their stuff on top of 4 tennis or racket balls...to isolate a bit from vibration coming up from the shelf
2. Moderate cost...various Herbies feet, sorbethane cones, etc.
You can also purchase 3"-4" thick high quality plywood shelves...anchor them securely. Cinderblock maybe with blu-tack is really cheap and very solid. There are custom high end guys who use 3"-4" thick high quality birch ply so you are in good hands using this stuff.
3. More cost...the sky is the limit. HRS, Stillpoints, Artesania...read the reviews...all are excellent. and there are others.
Tennis balls & really thick high quality ply may help get you started...but be careful!!! you dont want your equipment rolling off and breaking!!!
If you have further questions...let me know. Look forward to your results. Again, it does not always work but generally should help.
Then we can discuss cables if you wish. Good luck and have fun.