If he was only in there for 45 minutes, and came out with four area scores, it most likely was a brief/screening assessment, not one of the major comprehensives, which means there probably is not much further detail to be obtained, other than the name of the instrument(s). It is unlikely the testing will compromise any future testing your new district might do, or that you might have done privately in your new community, which would be the primary reason that you might need to know the name.
You do have the letter from the district, which could still be used for advocacy.
