More white ball pythons:

Russo X Russo
Russo X Mojave
Russo X Lesser
Lesser X Mojave
Yellowbelly X Yellowbelly (has a yellow stripe down the back).
Axanthic X Albino (double expressed recessive, takes a long time to get).


You can buy an all-white ball python--just check the classifieds. Be prepared to pay quite a bit for it.