I HIGHLY doubt there's anything out there for them in aftermarket, or ever will be.....but who knows. The Gen III Dakotas got pretty left out when it came to the offroad department, so I wouldn't expect anything cool to come out for the Gen IV's, or at least soon.
You best best is the factory skids, but make sure to see actual pics of them before you get anything, because the ones for the Gen III's are tiny. As for tow hooks, you might be able to get them right from the dealership. If not, then you'll have to go custom like us Gen III guys.
dunno bout skid plates, though im sure you could get them.
If i ever get my truck on the hoist again i will take a few pics of the skid plates for you, but trust me, they are very well equipped to handle just about nething you throw at them, and their coverage area is very sufficient.