Welcome to the forums, Kelly!
We got our A/C unit from Family RV in Florida, but they ship from a warehouse here in Ontario, CA. They sell on Ebay, but you can call them directly too. Their price was way better than Palomino for the A/C unit. We got a 15K btu, but we have a 31' Sovereign
. You probably only need the 13,5k unit. We bought a Carrier which has been really great for us. We didn't get the low profile because it was more expensive. They come with or without the heat strip. We opted for without as we already have a heater. It's a personal choice. As far as the fridge goes I have no personal experience, but have heard that Palomino has good prices. Shop around, do a search for RV refrigerators online. There's a lot of places that sell them. Some even sell used/salvaged/refurbished ones.
NEW CARRIER 13.5btu RV AC ROOF AIR CONDITIONER SYSTEM:eBay Motors (item 140341742556 end time Sep-23-09 11:28:59 PDT)
(refrigerators - new & recond)
RV Salvage Yards
(salvage yards listing)