After doing some research I have an answer to some of these questions. First off these covers are not listed as an accessory, they are only available when ordered with the vehicle from factory. Although a whole kit can be ordered. I do not have an image for these covers but they are listed as Tonneau cover w\embossed Ram's head. The listing also does not say that it is a tri-fold cover, nor does it tell me the size of the Rams head. The part numbers I found are 68249060AB for beds with RamBox and 68249062AB without RamBox. After calling my dealership friend, the list price on them is about $1450.00 and $1405.00.
I bought a roll up cover from TonneauCoversWorld last week and it fits like a glove. If you have the Ram boxes, you'll have to adjust the rails a little higher than they suggest,in order for the boxes to open and close correctly.