Does anyone know of where I can get a ...

Pony sized saddleseat bridle. Specifically for a Hackney pony. My little sis will be showing this pony and I have been looking up and down for the darn thing on as many sites as possible. im thinking I might contact a Hakney breeder and find out where they get theirs. I need to know soon as we plan to be in the ring with this pony by the end of May. Thanks for any suggestions that may show up.