You mean you are trying to find one for sale?
Your best bet is to find a RAM dealer you can work with, and have them do a search of the inventory.
Since most that want a DRW also want the Cummins, your gasser may be a unicorn, especially right now as HD trucks are in short supply.
If that's not it, you need to explain yourself better.
I just did a search on the RAM website and found SIX gas DRW's within 100 miles of me.