Fuel sending unit calibration

The short answer seems to be that nobody makes a good accurate replacement sender. Your options seem to be

1...Fix clean and use the old one

2...Get real lucky and find a NOS for less than your first born

3...Figure out how to bend,adjust, and use the repop stuff, possibly with the calibration box posted above.

For me? I'd just be happy to have "some idea" of having "low" and "empty" accurate enough to drive.