I called Dometic for a plastic cap on my window awning. They told me $2.XX for the part and $15.00 for shipping. The guy I was talking to said he thought the $15 was ridicules but was told there was no exceptions.
Most big RV dealers can order these kinds of parts and include them in their normal weekly (or so) parts order. This can be a big savings over ordering the parts as an individual for direct shipping.
curious Bob - we fulltime with our Cairn Terrier, in 01 National Islander, and 00 Saturn LW2