I had put it off on my wife's car for 6 months because I wasn't going to pay $450+ like the dealer quoted. Thankfully I ran across your instructions because the dinger was driving my wife nuts! The cheapest I found mine was for $83 at my local Advance Auto.
It wasn't as bad as I expected, but the inner door panel was the hardest to get off. I now feel I could do it in an 1-1/2 to 2 hrs. I know I spent a little time chasing down the right torx bits and other tools.
Ford definitely has a problem with it, but a service tech told my wife that Ford probably will never touch it sine it wasn't a safety issue.