You could also look into anthill pythons. They are a bit pricey but are great looking snakes. There is also the savu pythons. They are orange and hatchlings and juvies but as adults they go through ontogenesis and start to turn darker but keep some speckling.

If your not dead set on pythons there is always rosy, sand and rubber boas. Along with the viper boa, though almost all of them are imports. They are still a very interesting species.

Goodluck with your new additions though