Originally Posted by
BGfisher
Take the one you messed up to Fastenal. They'll have what you need.
I agree and/or if you have a machine shop nearby you could try there. I hope that you find one and that solves your problem, I'm also hoping that its the bolt and not that you have unscrewed the bolt under tension on limbs, this can cause the internal threads in the riser to pull and strip and when you replace the bolt it chews the threads out and then its a HUGE problem. Best of luck and hope that you get back up and going soon.