Filip has a downloadable CD Jewel case he made, here:
https://forums.creativecow.net/readpost/2/865087
The whole thread has details, and near the bottom, Serge has a link for his CD Jewel Case for Invigorator, but the link in that thread is dead, but… over in the Invigorator Forum a link is still lively:
https://forums.creativecow.net/readpost/41/855325
You do need Invigorator for that, but it’s a gem.. err Jewel.
I assumed you’d need Invigorator to do this, but Filip’s just uses psd files and gets an amazing result. He uses Calculations to combine channels which is a little beyond my paygrade, he lives over at the AE Expressions forum if you have questions, he looks around here from time to time.
With both, to get you rounded corners, you’d have to modify the sides or modify/rescan layers in Filip’s version, but at least you can see how it’s done. Amazingly well in both instances, methinks.