I just bought my 300zx and it had some issues, I have gotten the car to start with starting fluid and took out the fuel pump, I siphoned all of the gas and found bits of metal and fuzz. I then noticed the fuel pump has disengrated, idk what the part is but a little cylindrical metal sensor has corroded away and fallen apart. I am trying to replace the entire assembly or sensor but can not find what I am looking for. Any tips would be much appreciated!

If you go to https://www.nissanpartsdeal.com and enter your VIN you should be able to get the necessary part numbers.

BTW, here at NICO, we have Factory Service Manuals available free to members.
https://www.nicoclub.com/nissan-service-manuals

pics help