I choose to go one-up with the Corbin (08' FLHRSE4) vs Mustang and as shown, had it (and my bag set) recovered in hand-tooled leather and nile crocodile. The seat bottom was also cupped with gel comfort pads installed when the work (recover) was done. Workmanship compliments of Roberti Customs, Montgomery, TX (ships world-wide). I purchased the seat from Corbin and had it dropped shipped to Roberti. Note: work shown was done in absence of the MC being present, he's that good!
I got close to 15k miles on this set-up and have found the seat to be ultra-comfortable, good for distant rides, great at holding its memory (or better, foam/gel keeps its fullness well). What you can't see is the perforations incorporated into the base seams and pan of the seat which enable quick memory recovery.
For me, a custom seat is the only way to go go go....one that your upholsterer' fits/cups to fit your particular seating pattern (Butt!)
note: also replaced OEM 2-up with another Corbin, had it equally cupped/padded (for both rider and pax), recovered in all Nile Croc to match bag works, include both rider backrest and pax backrest. Even have an optional, larger backrest covered which I/we use for long tour rides . Interchangeability is not an issue....takes a few minutes, but again...no big deal...I like the diversity of being able to swap between seat configs and the end result (looks)