Gas gauge 74 Duster help
You can buy "repop" senders they are not accurate
You "may" find someone to rebuild yours
You likely won't find a NOS OEM sender
There is a device called a "meter match" to calibrate an odd sender to your gauge
TechnoVersions - MeterMatch for Analog Gauge Correction
I bought one tried it on the bench. Have not run it in the car "it's apart" LOL