There are a large number of piebalds for sale right now on kingsnake and faunaclassifieds. Make sure you research the breeder to ensure they are reputable and have quality snakes.
If you want a pied, then I'd suggest going ahead and buying a pied. The total cost of buying 1.1 hets, their caging, substrate, hides, heat source, thermostat, food, etc for the time it would take to get them up to breeding size, then hoping there's a successful breeding, then getting the right odds and actually hatching healthy pied babies will absolutely way be more than simply going out and spending the $500-$600 for a lower-priced pied.
If you'd like recommendations on good breeders, feel free to send me a pm. I put together a list of nearly 30 "good guy" breeders that should have pieds this season.