Bigeq.com always has some quality horses for sale. There's also several trainers in Ocala and south FL I know with high quality hunters, if you'd like their names and contact info feel free to message me. Good luck!
I know nothing about hunters, but a woman at my barn just picked up a very nice young sport horse in Ireland for a good price. (for high end horses anyway) She said they are a dime a dozen over there. Might be worth a look.