Would it be possible to build up a FXRT like bike? What model would I start with if possible. And where would I find a fairing and bags? Would I really have an almost FXRT or just a bike with fairing and bags added?
Your best bet would be to try to locate an FXRT. There's still a few around that would be worth looking into.
The FXR was a different platform completely with a frame similar to the touring bikes. It was about the best bike that Harley ever made.
Check out the different "bike for sale" pages on the net".
Harley Davidson FXRT 1340 Sport Glide Here is a good information page for you, The FXRT had a lot of unique features, that said there are still some out there, or you could build one starting with an EVO FXR:s Fresh Inventory - 11/19/2013 Have a look here for parts
I'm wondering if the new 750 might build up to a light weight tourer. I've been looking for a decent FXR and I'm finding they are pretty rare. Every thing I've found so far has been beat pretty good. Found a restored FXRT put man I could buy a new EGU for what the guy wanted.