I actually had 3 made when I needed to replace mine. Do you want one for $10 plus whatever to ship it? It's stainless threaded rod of the correct length with a hole tapped in the bottom end for the bolt that holds the aluminum band. I reused the bolt in that picture, and the nuts were cold welded. So you'll either need new nuts, or be able to reuse the ones you have. Make sure you grease those puppies up, and use a frikken giant washer!
http://www.thebeachcats.c…pictures&g2_itemId=47807
(that's Sol Cat tips in technical help, if the link doesn't work)