When I bought my 03 RAM new, it was a new body style and bed length. I remember being really worried about finding a hitch initially because no one made one. Within a few months, I could get pretty much any brand I wanted.
My advice, unless you are going on a trip soon, wait a couple months and let the companies catch up. You will have better choices then.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010