Searching craigslist, there sure are a bunch of roadmaster mountain furys on it across the country... maybe one of them is close to you & fits:
http://www.google.com/search?q=roadm...ient=firefox-a

It looks like roadmasters were possibly from walmart, because they've got some roadmaster mountain sports on their website and while not $15 like your last one, they're not too expensive:
http://www.walmart.com/search/search....y=0&Find=Find