I also used the Kaplan material (took a course... the lecture part of the course is kind of pointless, so an online class would definitely be good enough. The online tests and quizzes are really helpful, the workshops aren't). I think the Kaplan review notes (the large, 1300 pg book) is really helpful... but different people have other views. I'm also using the OAT destroyer and TopScore.
The destroyer and topscore basically over-prepare you with lots of detail, so just make sure that whatever you choose to use, you don't spend all your time focused on details and forget the main points.
If you can only find DAT material, it's basically the same exact thing, as long as you use something else for physics.
Good luck!