Well, i have a few questions for you. 1. who was the breeder? 2. what show did you see this at?
Ok, i have never heard of a blonde morph. That's not to say there isn't one but i doubt someone would name a morph blonde knowing there is a giant hognose that is blonde.
The Malagasy blond hognoses are usually not solid in color but have a slight speckled pattern to them. They actually look like a speckled but VERY light in color.
As for having a malagasy in America, from my understanding the majority of them are WC. I have never seen a CBB one in America. Again, not to say there aren't any but i have checked all over and have not been able to find any.
For the price, it sounds like a light colored normal heterodon. The Malagasies are usually large even when born so they are pretty easy to tell apart, and their face is completely different.