http://www.caferacer.net/forum/topic.asp?TOPIC_ID=1443
this is what you want to build:
mecatwin in france makes cafe racer parts for modern sportsters:
http://www.mecatwin.com/
this is also cool:
american cafe racers, but I don't think they sell individual parts. Something to shoot for though.
http://www.americancaferacers.com/motorcycles.php
There are plenty of guys that flattrack and drit track sportsters and XRs, some of their parts will swap over and make good cafe racer parts (like seats and tanks).
dresda used a sporty motor in a norton frame and built this badass:
They may be able to sell you a frame kit and you can go from there.
this is what you want to build:

mecatwin in france makes cafe racer parts for modern sportsters:
http://www.mecatwin.com/
this is also cool:

american cafe racers, but I don't think they sell individual parts. Something to shoot for though.
http://www.americancaferacers.com/motorcycles.php
There are plenty of guys that flattrack and drit track sportsters and XRs, some of their parts will swap over and make good cafe racer parts (like seats and tanks).
dresda used a sporty motor in a norton frame and built this badass:

They may be able to sell you a frame kit and you can go from there.