I'm also not familiar with most of those tests, but the lexile scores you have are right about the same as what my dd12 had in 2nd grade at the same age. I believe that the 1050 range was the 99th percentile at that grade.
What would you be hoping to get out of a further eval? Do you want to consider subject acceleration, grade skipping, something else? I guess that having some idea of what you would want if she seems to need more than what the school is doing for her and also knowing if anything more is even possible in your school is a good place to start.
