Since you're just interested in looks and not locality, I'd just browse breeders with designer GTP and find a snake that you like. The one you posted has a lot of blue, and if genetic, the price is a lot higher. It just depends on how flexible you are with the blue look LOL. If you're okay with less blue, there are a ton out there to browse through.
I'd join the Green Tree Python fb groups to look for breeder recs or snakes for sale.