Attached Link: http://www.studica.com/CuriousLabs/

I've heard that PA is just P4 repackaged. The features list on EF's site seems to confirm that. Here's one place that says they sell ProPack but it's education/student sales only. Note they list P6 and PA as "Curious Labs (eFrontier)" and PP as just "Curious Labs," so I think maybe EF never really adopted the product. I'm sure they're stocks out there somewhere it's just a matter of finding them.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken