Even normal breeding size females are in short supply, let alone piebald or het piebald ones... Hate to break it to you, but I highly doubt anyone would be willing to engage in such a project. You'll need to purchase your own female, most likely as a hatchling, and grow her up yourself. I would make certain I bought a 100% het female, as when you start mixing different possible hets together, it's pretty much a waste of time as far as producing any morphs is concerned. Sure, there's always a chance, but since morphs are more likely to drop than rise in price, time is money if you're seriously thinking of hatching out some pieds.