Hi Shante

Here are a couple of bags I found.

This first one is not too expensive, and the second one comes with an outfit and is a bit more pricey.

Not sure if these are what you are looking for but may help!

http://www.renderosity.com/mod/bcs/backpack-m4/85844/

http://www.renderosity.com/mod/bcs/the-hitchhiker-for-v4-a4-g4-pbiv/77279/