I ran across a great vendor on Ebay that creates replacement cases for most retro games (CD version) PS1 , PS2, GameCube, XBOX and others. I wanted to pass along his link to you and spread the word. His prices are very reasonable and he can offer special like buy 5 get 2 free or even other specials if the bundle is bigger. I have purchased some of his work recently and am very impressed by the speed and the work put into it. I highly recommend his work.
His Ebay Handle is : citizenpayne343
Here are some of his examples.