I think I would call ahead and be sure that parts store has the fuel pump on the shelf before I would make the trip. If you are that far away, I would buy the pump on line and have it sent to you. I would also strongly recommend you plan to change the oil and oil filter along with changing the fuel pump.

I also would not drive it any more then you absolutely have to. Gas mixed into the motor oil can kill the bearings pretty fast. You really don't know how long it may have been pumping gas into the oil. .