Mine are a brand called CounterAct. I got them at a Love's Truck Stop. I think I paid $20 for a good sized bag. Still working on the bag 5 years later.
I also use counteract beads. I talked with their sales rep and he said the beads they use in their big truck kit and the motorcycle kit are the same beads with the same coating. he also recommended I purchase from amazon instead of ebay due to counterfeit products on ebay. they actually sell direct through amazon. every counteract brand bead on ebay is resold through a 3rd party and could be fake.
here is a post i made a little while back. towards the bottom is a semi lengthy update with the beads i chose and why.
http://www.valkyrieforum.com/bbs/index.php/topic,97343.0.html