Then, if I were you, I'd look into getting a 100% het female. If you don't want to wait another couple years for her to get to size, really look around everywhere online, or at reptile shows and I'm sure you will find someone selling a breeder size 100% het pied, even better if she's proven! Otherwise, you could technically hold back a couple female offspring and when the are ready breed the male back to them, but there's no guarantee they inherited the gene necessary to make pieds.
You'll figure it out, whichever route you take, I'm sure it will be worth it to you in the end!