I know it's a long shot, it seems like nerf bars go on a bike and never come off; I've never seen a set on ebay!
I'd like to put a set on my KLR to protect the cooling system better, as I'm pre-emptively replacing my radiator due to what I will call "enthusiastic riding"
If I could find a used set in decent condition, that'd make me feel better than spending $300.
http://www.happy-trail.com/pdnerf-klr650a.html