I am unfamiliar with that particular boa, but I was determined to try to find out for the people who own the boa. To me it looks like it could possible be just a very dark Columbian or a Col/Long mix. She does have the medalian on her head, and she is predominantly black and silvery-buff. The lighting gives a yellowish cast that she really doesn't have.
This is the only pic I have of her right now - I hope you can see enough of her to base an opinion.

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Photos 

