The HD police solo seat is another option. I have one on my 2012 RKC and like it very much. The police seat does sit up higher than the frame, so there is a little daylight beneath the seat, but I think is looks more like the retro FL models of the 50's and 60's. Then again, maybe retro styling isn't your thing. I dunno.
Another thing to consider is relocating the floor boards out 1", or perhaps forward & out 1" in each direction. This will allow your legs to extend further and not promote leg fatigue or hip cramps.