It has 3 saddle rack slots, but only 2 trees and I'd like to order another one. The dealership we bought it from quoted me a price, but I'm betting I can get it cheaper online if only I can figure out how to google it to find one...
Maybe call a pic n pull or a junkyard and you can salvage one and have someone put it on for you.
I did a quick google search for horse trailer parts and couldn't find anything but I didn't look for very long.
How about those snap type things that hold the doors open or closed? They are a circle with a bar through the middle. Mine were stolen so they are now held with one end of a double ended snap but we all know how easily those things break.