Here in the Netherlands we have web sites with on-line used parts (posted by all possible recycle shops) and web sites were customers can post wanted parts. I presume there should be something like that in the states as well...
249US$ per door panel...how many do you need (2??)...that is about 575 dutch guilders...Personally I think this price is rather high (for 1 door panel) and I would not pay that amount of money for it.
What is wrong with your current panels (dirty or broken)?
with a minor 600+k