Anyone know where I can find parts for one of these? I picked one up a couple years ago for $15 bucks on Craigslist. Thing has been great for the kids and adults (after a couple "sodas", lol).

One of the tie-rod ends broke and I'm having a heck of a time trying to find one or match one up. It seems to be an odd metric thread and they are pretty small.. I'd love to track a couple down to have on hand. I'm hoping to start my 2.5 year old on it in the spring... Any help would be greatly appreciated.

Thanks!