There is a relatively new website called practicemakeslawreview.com
It has a Bluebook practice exam and answer key that is designed to mimic the exams that law reviews give for write on competitions. There is also a ton of more content on the horizon, such as practice questions, video tutorials, common bluebooking errors, tips for essay writing, and much more. Plus, the makers are always looking for new ideas for content. It is definitely worth checking out!