Here is a collection of 100 covers for people using this manager. I don't know if they will work for other managers. I'll be uploading more as I make them. I don't have all of them labeled by titleid, but it's not hard to figure that part out. The version of open manager I like is Jurai2's Cover Manager Revision 8 Preview 3. Any other version of his manager looks different than the one I am suggesting. It will over write open manager but not backup manager. I have attached 2 images of the manager and the manager itself.
100 Original 3d covers
100 Style 2 3D covers.
100 Style 3 Covers
50 alternate original 3d covers.