Hi Guys, I found this original tire from the Sandcast model on a Kawasaki (sorry did I swear) rim at a swap meet in England. I bought the wheel just for the tire as I couldn't bear the thought that someone would buy the wheel and throw away the tire no knowing what it was. So I pulled it off the rim and now it's on eBay. I'm surprised at how pliable it still is, maybe it been hidden in a cold English shed for years rather than some hot American garage.
http://www.ebay.co.uk/itm/280811346126?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649If link doesn't work the ebay number is 280811346126
I started it low and it's a no reserve auction as I just wanted the tire to go back to the right classic bike. I'm not going to pull the auction early or change it to buy it now, I don't think that's fair on those who have been bidding and watching for days.
So good luck if you bid and I'll keep my eyes peeled for those Sandcast parts.
Mick