Agreed, the FXR4 seating position is subpar at best. One of the things we have in the works is outfitting our FXR4 with the 2011 XL1200 Custom's lower part of the riser. They pull back roughly 2 inches, but still keep that for the most part stock look and clear the tank gauges. No change in the triple tree is necessary for this swap. There are two different bolt lengths that can be used, so I will post the actual length/part number of bolts when it is completed. Also, we went with a 2011 XL1200 Custom stock chrome handlebar. They are about 2" rise also with more pullback and they feel slightly wider than stock. You can utilize the same handlebar top clamp for this application. It also modernizes the look of the front end slightly without making it look "Custom".
We also have on order a LePera Maverick seat. They have 7" of back support and utilize a steel seat pan rather than fiberglass or plastic. You do have to change over to the previous hinged style saddle, but the ease of access to the oil tank and battery are well worth the investment in the parts. This conversion to hinged costs $205.00 (not including the saddle.) We'll post picks of both when completed.