Closed for Company Meetings: Between September 18 (5pm PDT) and September 22 (12pm PDT), Support and Sales requests will be delayed. Only time-sensitive issues will be addressed during that time. Thanks for your patience.
Regarding apple AU, they are part of the CoreAudio libraries, and are not standard AU plugins in as far as there is no separate component file for them. They are part of the OS basically. So you won't be able to find those on your hard drive anywhere.