You can download three real SAT Subject Tests in Chemistry (made by the Collegeboard) here:
The other three tests covered in the SAT Chemistry Review course are only available in books sold by the College Board:
The Official Study Guide for ALL SAT Subject Tests, 2nd Edition — Contains one real test
The Official SAT Subject Test in Chemistry Study Guide — Contains two real tests
(Note: The above links are affiliate links. If you purchase these books through those links, I get a small commission at no additional charge to you. Thanks for your support!)
SAT Chemistry Playlist (Youtube)