The last time I knew anything about Ford power step replacements, Ford was selling each side step as a complete unit: step, motor and idler. You could research the cost of buying the part and installing it yourself, but it being a large package, any savings will likely be eaten up with shipping costs. A body shop can give you an estimate as well. They get a discount on the part and don't have to mark it up as high as a dealer might. And that's assuming that they can get the part and schedule the work faster than the dealer. Option three might be to check with late model truck recyclers. If you don't mind working on your back, it should not be a difficult R&R process.
