Good topic! I never though of asking this question but I am on the same quest. I installed a Todd Leanig post when I first got the boat and it works well, But afer 5 or so years I am getting older and looking for a seat. I would like to find a seat/ leaning bolster combo. I have not started shoping yet but I will be keeping an eye on this post.
I like these although pricey,
To replace this.