Like I said above The Filling Station sells a pump that is close in appearance and, while not exact dimensionally, close enough no modification is necessary, or at least wasn't on my 53. Speedway sold me one (after installing the one from TFS) that I put on my shelf for a spare that is appearance and dimensionally exact to the original.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.