replacement shafts for wide shetland style mini

[melgray97]

Help! I have an easy entry cart with 48" shafts that I am using with my newly acquired 37.5" mini. I want longer shafts with enough room in between for her to be able to bend & move properly. Even at fighting weight, she has a very solid build (c-size mini comfyfit harness with pony breeching). Anybody have suggestions on where to get a 52-54" set of shafts with at least 17" in between at the narrowest point?

I am trying to upgrade this cart economically, so that it is usable while I save for a Hyperbike.