I kind of got "lucky" when mine "Failed" (During installation of a new cooling unit) Wires broke off so the tech popped in a new one from her stock.
Oh here is another thing.. I ordered a set of "Interior" fans from RV Cooling Unit Warehouse I think on Monday.. (not sure of exact date)
Installed 'em. fins now frost free (well most of 'em) fridge much cooler on same setting, Very happy.
The only issue is the instructions.. The web page said to run the power leads down the drain hose but on a Dometic I truly do not want to do that.. So I ran 'em to the interior light.. Worked great Will need to shorten 'em later. as I had to "wind up" excess cable. also lock it down somehow.
you can get 'em from multiple sources (Same price on Amzon by the way) but they work.