I actually have come across one or two bundles online with Eragon included, one is a Xbox 360 version, and another is a PS2 version. I am yet to buy the bundles, but if they're still there when I'm ready for another bunch of games I'll be sure to pick it up.
I'm familiar with the game, but have never played it. If I end up up picking up a copy of it I'll let you know. I don't know how it works with region locking, I know that affected some games, but I think they done away with it for the PS2 and onwards.