[davidpendu]

I perform on aerial silks, though not professionally.  The fabric I use, and that all the folks I train with use, is 40 denier nylon tricot– $15/yard for it would be quite spendy (the place I bought mine from lists it as $6.50/yard).  Bear in mind that it's hung doubled over, so you need twice the length from ceiling to floor… that's 12 yards if you have an 18' ceiling, which isn't *really* all that high.

People get very particular about rigging, and rightly so– talk with someone who is an expert in that (not me) before setting up your silks.  But the actual hardware, if you don't buy it in a package with the silk from a specialized aerial apparatus vendor, is basically all rock-climbing gear, and can be bought in places that sell that.