For a leather saddle I can't help you...I do have a used Wintec 500 (cair panels) with the full gullet change system and stirrup "leathers" (not the webbers). I also have a riser pad. It is a size 18" seat. I am 5'10" It was my first saddle - while I was going to college with 2 horses
When I bought my new horse I got a new saddle, so the Wintec is just sitting in my basement.
I also have an older, leather jump saddle that isn't getting any use. I think it's a "big name brand." I'll have to go check the name brand and seat size...it's what I used in 4H.