You need to find a different dealer! I did in fact go down and order a 2013 Laramie 3500 DRW 4x4 yesterday. I was prepared for scribbled on product sheets and a lot of I don't know etc... It was the exact opposite! I sat right down with the sales manager at his computer and we went over the 5 trucks that they have pre ordered and one was close but had the wrong interior.
So, we proceeded right down the check boxes and when I had a question about a package, the information popped right up.
I was able to order exactly what I wanted no fuss no muss. The only thing I might have considered was the 5th wheel tailgate. But, it was not even loaded into the system.
The duallies start being built at the end of Feb, so they said I should expect the truck sometime in April.
This was at one of the largest volume dealers in the US.