have you considered seahorsesource.com... this is DANUs company (him and family I think). I got 2 pair of Kuda from him and they are great. They started breeding 6 weeks after being in my tank. He ships them bigger than most which may make a difference. I got mine on Dec-12. They eat like pigs, play with each other, explore the tank, and are all around pretty cool. I am sure there are lots of good places to get horses, but I don't hink you'll find any better than Dan and family. IMO anyway.
Good luck, let us know what you do, Kevin