If you like Parelli but can't afford the prices of his leads, I have found a site that has almost identical leads to his but WAY WAY CHEAPER.
I just got mine in the mail today and I honestly LIKE THEM BETTER. I have used Parelli ropes before and they are nice, my trainer has the Parelli ropes but mine actually work better and are much more comfortable in your hand. I bought the Eye Loop Yacht Lead so that way I can replace my clip or not use one if I'd prefer. :} They are AMAZING.