I'm going with a Teutonic 1000 mile style solo springer seat. a lot of the old timers ran them back in the day and still do. I didn't like the hose clamp style mounting system, so a buddy of mine fabbed up a little better set up. The 2 seats I have are, I believe, Teutonic knockoffs. Anyway a lot of the oldtimers liked them.
Looking forward to pics of the finished project !!
Rode a few HD solo & Servi-Cars with that kind of seat...when padding is new/good condition...they are comfortable..