Helping with File Formats

I've recently been researching some file formats ( and dropped my noobish talk ) and might be able to have a small look in some GC file formats. The only problem is that I don't have any resources, any files from GC games to try and work on.
I don't have Phantasy Star Online, and ROMs are too big to download, as this broadband can't take a gigabyte game.
So for texture or model trouble, I can maybe help.

Oh, and I cannot take resources from games age rated higher than 11+. And I must know which game the resource comes from.