SmallHaul-most of the slip rings on E-bay are going to be 2-amps because the wires are "super tiny" and that is all they can handle. Here is a place you can get about any kind of ring you want but they are "very pricey"!
http://www.moog.com/products/slip-ri...through-bores/ .
This is just the thru-bores. You can look and see what you need.
They are in Blacksburg VA.