Red Tail Boa - regional guess info needed

I adopted this beauty from a rescue in October 2004. Loads of pink all over (even some lavender), very pastel-like markings (especially the saddles) and a very yellow tail.

I think he may be a Suri but I am not certain. Can anyone with a better eye offer a guess as to where he might be from, or confirm my guess that he may be a Suri?

Thanks!