Wow, I'm really surprised. My riding buddy had a Tucker made a couple of years ago and the customer service was wonderful, and the saddle is pretty fabulous. We did do a tracing of her horse's withers to get tree size. I suspect the real problem may be your local dealer.
Can you try calling Tucker directly? 1-800-882-5375 or locally at 361-293-3501 - that's from their website.
I know people who have the Tuckers love them, and I was impressed by the quality. I also really liked the option to put English rigging, billets and stirrups on the saddles.
The other saddle I often hear mentioned by people who do the long trail rides are the Imus saddles. Gaited Horse Saddles