I have a very short-backed Arab that I ride with an Aussie saddle (stock
type, and I've no idea what size or brand it is, bought it used with no
visible labels), which I love and which seems to fit Lakota just fine. I
find that the Aussie saddles are hard to get out of, even when you want to
(dismounting is a real treat!) -- I don't know of any saddle that will
stop you mid-way through a head-long tumble and throw you back into your
seat better than an Aussie. (that's the voice of experience speaking :)
Glenda & Lakota (25 down, 1000s to go!)