If the dealer will not help you, get an estimate and send it to them with a polite letter explaining if they do not honor the warranty you will have no choice but to file a claim in local small claims court and inform the better business bureau that you feel that you are being treated unfairly. Most dealers will respond...
When I bought my PowerWagon the winch kit was missing and I did the same thing... I ended up obtaining one for free at my local dealer because I reached out directly to the dealer and wrote a letter to RAM. Dealers do not want to go to small claims court, or pay an attorney to go there...