Triumph should make one. I have heard of a more dirt Tiger soon.
The frame was built by a gentleman who, along with his son, builds cars for dry lake beds. Speed run cars. They do a lot of sheet metal fabrication so that is why the Alum. tank. That, and no one had the right shape and size. I can go 200 miles between fill ups.
Great handling bike. Actually, one of the, if not thee best I have ridden on road. Of course, it's not a CR 250 in the woods but very do-able, even with street tyres. I do have a full set of knobby wheels for it too.
It's just a one off. He has no plane to make anymore. At 72 y/o, Harry just wants to play when feels like it. 800cc Triumph was just a bit too much at times for him. He did an amazing job on it tho. Showa, linkless rear shock. KYB forks. Nice stuff.
KTM just came out their 690 Enduro which looks nice. And there is a company in Brentwood, CA that makes a converted Duc 695 into a 50/50 bike. Little blurb on it in Road Runner Mag.
http://www.terramostro.com/
Hopefully, Triumph comes to the table too. It's not like all their bikes are nostalgia bikes. I think a mid size Adventure bike will be the way to go.
Chao