I have wanted to do this since the day I bought my '13 TG.... Have owned 4 Ultras and the first think I did was make the tour-pak detachable. As so many have indicated, found out real early that the parts for the flxxx have been discontinued.
BUT this might go the way of the StreetGlide. Harley saw that all of us were pulling out Ultra tour-paks off so they brought out the StreetGlide and started selling the tour-pak separately for more $$$$$$.. than if you'd bought an Ultra.
Now the hunt begins AGAIN.....!!!!! Does anybody have the HD part numbers for the rack and back rest ???
8~\o