Double check that. Here's the LSAC policy from the LSAC website:
"For disclosed tests, test disclosure materials and all other score-related material will be available online at approximately the same time your score is e-mailed. This information includes your answer sheet, score conversion table, and test book."
http://lsac.org/JD/LSAT/LSAT-score.aspIn your answer sheet, you should see two columns for each question: your response and the credited response. That is the answer key that you'll receive from the LSAC. You can find this sheet after you log in to your LSAC account.
And let me know if it's really not there!