There are a couple cargo management options available from Mopar- here's the link to the webpage detailing the rail system with an adjustable bed divider, or the traditional bed extender that can also be positioned inside the bed to section off a portion for groceries, etc.
http://www.mopar.com/ram/1500/2014/shop/362751/274/4986/
There are plenty of aftermarket options as well, just google it.
http://www.mopar.com/ram/1500/2014/shop/362751/274/4986/
There are plenty of aftermarket options as well, just google it.