Oh, I finally did it! After a lengthy and thorough search, I made my choice: I got the Dixieland Plantation saddle. It arrived in a box not even 2 weeks after ordering it directly from Dixieland saddles. The saddle was not in stock but was handmade by Amish people in a short time and shipped to me. Their website is DixielandGaitedSaddles.com "Dixieland Gaited Saddles is the premiere gaited saddlemaker producing the finest western trail and pleasure saddlery available for the gaited horse."
The saddle is beautiful and fits well. I was so happy with it, I even wrote a very positive review at horsetackreview.com
My review went something like this: I have now been able to use my new Dixieland Plantation saddle a few times on my TWH. It seems to fit quite well. I did a 2 hour ride and my knee that usually hurts after an hour did not hurt. I find the saddle puts me in a more balanced position for my seat and back. I also find this saddle puts me in more contact with the horse than my Western saddle did, and I like the motion of feeling the horse's movement. I've done some flat work with it too (which I normally use a Dressage saddle for), and my gelding gaits well, and we can even do dressage moves with it.
All in all I would say the Dixieland Plantation saddle has the precision of a Dressage saddle, the comfort of an Endurance saddle, and the safety and relaxed seat of a Western saddle.
I just came back from attending the Mane Event, our Canadian version of a horse expo. Looking at the many saddles there, I did not see one saddle that has the look, features, quality, -and- good pricing like my Dixieland saddle. Wow! I think we need a Dixieland distributor here in Canada - if you're looking for one, I'm interested!
Attached is a picture of me on TWH Rollie, riding in the new Dixieland saddle. The saddle also fits quite well on his half-brother, also a TWH but who is built taller, less stocky than Rollie.
Both pictures are of Rollie with the new saddle.