These are awesome, don't forget that Storz Performance has flat track kits for the Sportsters too! They are just the cosmetic stuff, but as with any H-D engine parts are ALWAYS available.
http://www.storzperf.com/xr1200.html
(Still haven't learned how to post pictures!)
I've seen that bike, but for me, it's just not right. One of the things that I love on the XR-750 is the port arrangement. The intake ports are on the rear of the heads, the exhaust ports on the front. This allows you to have a pair of staggered carbs with big K&N filters on the right side, and the exhaust pipes on the left side of the bike. I know, it probably sounds silly, but hey, that's what turns me on!
Mark