Mike, did you check with "RVCool". I have no experience with them, but have run across their adds in the past. I did look at their website, and your cooling unit is listed as one they do rebuild for resale. Of course, your rebuilt cooling unit is about twice the price of the standard fridge cooling unit!! lol lol
http://www.rvcool.com/CoolingUnits.htm
http://www.rvcool.com/CUPricing.htm
Might be worth checking with them, if you haven't already!