Is there a water line attached to the pump still? After shearing off the head of a well while plowing, I was faced with the same challenge. I used 1/4" coated cable with a home-made hook to snag it (luckily between the electrical supply line and the water line.) I dropped my set up down and rotated the line until I felt something. I hooked between the two and the hook caught where the lines were taped (yes, taped) together. I ended up having to use my truck to get the line up. Put a new connection on the head plate and was back in business.
It took a while "fishing" to get the feel of things, there were many times I thought I had it, but realized after pulling 50' or so of cable up that there was nothing on.
FWIW, I'll post up a picture of the hook that worked, along with some of the others that didn't.
Patience and persistence are the key. Good luck.