The Bullet bug still nagging away

Ever since I posted about Bobbin' the Bullet a couple of weeks ago using the Hitchcock's hard tail conversion, I can't stop thinking about doing it. I can't really use the Madras Marauder as that means I would have to buy a daily rider to use, and that's not what I'm after.
I would like to get another 500 Bullet to convert, and rather than get something in a project status, I'd rather it be up and running. So, if anybody out there has, or knows where I can get, a decent 500 Bullet for a reasonable price please drop me a line.