You just brought back some memories -- I bought a horn from Washington Music Center in 1976 -- I'm getting so old
I'd try as many horns as possible and try the Schilke P5-4, Kanstul CCT920, Kanstul ZKT1520 and ZKT1522 last. I still find that they are the piccolos to use as the base for comparison.
Remember that if you find a good horn you are in for the long haul so price should be your last consideration. If price is important, then you need to wait and buy your piccolo at a later time. With a piccolo you never want to say, “I bought this one but the _____ was amazing.” If you find an amazing piccolo you need to buy THAT HORN.