I purchased the solo seat w/diver backrest, matching pillion & matching HD detachable passenger backrest from a forum member a few days ago and while it's all in great shape, it's just not the set up for me. According to him, the original owner had the seat narrowed and slightly lowered. I did not ride this seat, simply mocked it up on my bike and sat on it.$450 for the complete set shipped anywhere in the contiguous 48 states.
(I'm using his pics due to it being about 798* in my garage but if you want pics from me that's not a problem)

 

Sent you a PM...I will take it.

 

PM replied