How to make Snow Rosy Boas?

[SerpentGirl]

Hello, I hope I put this question on the correct forum. I was debating whether to put it here or in the breeding forum. I hope I chose correctly!

Now to my question(s). I have a Borrego rosy boa pair that I haven't bred yet, but I'm getting them ready. They are doing well. Anyway, my love for these snakes continues to grow and I want to get further involved and informed.

Which snakes would I need to breed in order to get "snow" rosy boa(s) in the clutch? I can't afford to buy snows. They are rather pricey. But they are my most favorite color! They are simply stunning.

I have been reading around the Internet, but I usually end up more confused than informed.

I assume I'll need 2 het. snows, right? Does it matter what type/locality?

Thank you for any/all help. These are such wonderful snakes. I have owned a few babies in the past, and now the adults. I just love these snakes.