Does anyone know who makes/sells...

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.

Ljgj, I use the same thing and the sonic improvements were astonishing - greater than any upgrade I've made - aiken to say several thousand $$ :) just kiddin - I do use these and they look interesting but I can't hear any improvement with my rig.

I would say you are right about audible sonic improvements - they do keep them off the floor - these are particularly good on cable tv lines in the attic - it keeps them from touching the electrical lines and picking up interference when that does happen and crossind such lines are unavoidable.

Well. Before you go out and spend $120 bucks on some peices of ceramic i really think you should try something cheap. I have a system worth. around $2000.00 and i have Pool coping bricks under my cables. I didnt notice any differences, but hey its a free tweak. and it looks ok too.