I wrecked many times, but have never demolished a swingarm.
Try eBay, maybe someone who's grenaded an engine is selling off the remaining hardware cheap?
http://cgi.ebay.com/ws/eBayISAPI.dll...535313484&rd=1
I'd recommend some of these too, if you don't have 'em already.
http://cgi.ebay.com/ebaymotors/ws/eB...category=35596