I wanted to tackle this myself, but it's now about 20 degrees here in Michigan.
So I took it up to our Local Ford dealer in Southfield, armed with all the knowledge from these posts. Considering that parts themselves are $200 from Ford ... (I know the kits online are $99, but those are not Genuine Ford parts.) Anyway, I expected it would run $700 or more, as others had mentioned. As a pleasant surprise, the total was $537. At this time of the year, I think it was $$$ well spent.
Earlier in the summer the Power Sliding Door motor went, and that was going to be $1000 to fix. Found a used motor for $100, and back in business ...
but it was warm then.
But I just want to say ... this forum is the greatest thing since sliced bread.
It can really save you some serious coin.