The glass screen from mashmods is your best option.
If you get a new plastic screen, its just gonna get scratched the next time you breath on it.
The glass screen from mashmods is very very scratch proof, and much clearer screen than the ugly plastic one. You can send your GP32 to him or just have him send the glass to you. Installation is simple, simply CAREFULLY pry up that gray screen liner, remove the plastic screen (carefully!), and replace it with the glass screen. Just be sure not to breath on, or touch in any way, the flu screen.