When I trod this road a few motnhs ago, I found that Part 2 of JAA docs are not available from the JAA website, and you can only get Part 2 in hard copy from IHS, who supply hard copy JAA documents. Costs an arm and a leg. Makes the CAA look reasonable.
Also beware they will automtically assume you want updates and invoice you for the privilege for those too. I eventually paid up for the update I did not want just to keep the accounts department off my back. I suspect that sort of business practice is not even legal, but line of least resistance...........