The problem with going to a fitter or saddler will be that if the tree's busted, the saddle may have been taken apart to determine that (unless the break was really obvious). Most people don't put the saddle back together if the tree's broken. However, the advice to find an old banger on e-Bay is very good; you can probably find something for decor without breaking the bank, and it won't be in two pieces!
I have one sitting in my basement taking up space- not sure it has a broken tree but it's fairly ancient. You can have it for shipping (or it pick it up, I'm 45 mins from Lancaster). PM me if you would like to have it
“While the rest of the species is descended from apes, redheads are descended from cats.” Mark Twain
I have an ancient tree spread Cortina 14" AP that is sitting in the carport. We used it to lead little neighborhood kids around on our medium fat as a tick didn't mind the spread tree cause his back is like a table top (get all that?) It's tiny but would be good for doing display/window dressing or Cracker Barrel type decorating. It's your if you want it and will pay to ship it. It's weighs about nothing.