OE telescoping mirrors WILL be pricey - probably in the $500-600 range for a pair.
I don't know what your mirrors look like, but I use Cipa slide-on mirrors that I bought at Camping World. Here's a webpage:
http://www.campingworld.com/shopping...-mirrors/7753d
They work great for me. I adjust the truck's mirrors to see the area to each side of my truck and the slide-on mirrors give me vision back along the sides of the trailer to the rear. There is no vibration and they're big enough to actually see something with. And, they go on and off in about 15 seconds. However, they may not make one for your model year truck yet.
I tried the ones that fastened with elastic bands on my previous truck and they did not work well at all. The mounting was too flimsy. I ended up using this style:
http://www.campingworld.com/shopping...w-mirror/14887 which was a pain to mount, but they worked well once on the truck.
Looks like the thread Lars has given you has people putting telescoping OEM mirrors on their trucks, similar to the kind you see on the 2009 models and earlier Superdutys.
- Jack