hardhat

Hello all.. I built a 2 stroke bicycle. However, I am looking for a different gas tank for it. I found one I really like that are standard on another builders bike. They won't tell me where they got them. Does anybody recognize this tank? Here is a link to their website. I promise I am not affiliated with these guys at all!! I know this looks like I'm phishing with this post. Thank you! http://www.derringercycles.com/slideshow/gallery.htm