I found these deleted items by accident while tampering with Cheat Engine on the PS2 version of CVX using the PCSX2 emulator (It's a bit more complicated than that and I don't wanna turn this into a Cheat Engine tutorial). After obtaining the items I took screenshots of them and cropped them with Photoshop. Note that these items are present in the game files but they're left unused. I'm also quite sure that they do exist in the other ports of CVX. The only way to obtain them is by using Cheat Engine or a similar method that lets you access pieces of data stored in your computer's RAM, some of which relate to in-game values.
These are the deleted item values (They work on both the American and Japanese PS2 versions of the game.) 4 Bytes: 5297152 = Album 7159316 = Queen Ant Relief 7259316 = King Ant Relief 8359316 = Picture B 9197152 = Remote Control 9859316 = Square Socket 10059316 = Crest Key G 6259316 = Wire 2670561 = Rifle Bullets 9397152 = Calico bullets 2495368 = Machine Gun Bullets