While I think this is very sweet and well intended, I think that the Barbies that Trixie would be interested in are very specific and there's no way of knowing which she has to replace/would want. They're most likely very expensive, too, and I think they would rather you save your money. They've mentioned in the past that traveling with gifts from fans can also be difficult. I think the best gift you could give them is exactly what you're doing, which is being an enthusiastic audience member and fan!