Need Stock Short Chain Adjuster

I'm in need of one of the stock chain idlers that looks like this
http://cgi.ebay.com/SHORT-STURDY-Ch...ryZ11332QQitemZ400050337569QQsalenotsupported

I need to take up a little slack on my rear whizzer belt, and I'd rather not dish out 20 bucks for one if somebody has an old one lying around.
Thanks
-Nolan