Does anyone know who makes/sells...

I can immediatly tell a difference when elevating my speaker cables with simple blocks of wood, I would try that before investing in anything expensive and see if you can hear an improvment.

Check in the electrical isles at Home Depot. Seriously.

Czapp I found a tweak that you may want to try. Get some large Dixie cups,cut a hole through them, slide your cables, and then turn the cups upside down(opening on the floor). I have my cardas cables dressed as such. Can't say much about sonics but it keeps them off the floor. Good listening!

Stehno is right. You can buy the same thing at any big hardware or electrical supply house. These are MUCH cheaper to say the least. Unfortunately, the ceramic used is not "audiophile grade" : )

These are called "cable hangers" or "wire hangers". They come in two different heights, one being much shorter at about 2" and the other about 5-6" or so. I would HIGHLY recommend using the larger ones or you will have to have a support every couple of inches. This is due to the natural sag that the wire has hanging from the suspension points. Sean
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I bought some pipe insulation foam - it is sold at Home Depot for 80 cents to 1$ for 8 foot lengths I believe - it also comes in different thickness - it is used to wrap pipes to keep them from freezing. You can slice it however you want and either place the entire cable in it or cut the stuff to place as far apart as you like. It keeps the cable off the floor and from coming in contact with other power line cables that might add noise. It is dark gray in color and really does the trick. It also helps keep other cables from coming in contact with each other in my setup.