14 XP1k Fuel Level Sensor Issue

I recently have noticed that my fuel level on the gauge is showing about 5/8ths when full. It appears to operate normally once the full level reaches that point and towards empty. From what I have been told the level sensor and fuel pump is one unit.

Is there a way to repair the level sensor wo replacing the hole unit?

Is there an after market replacement unit available?

Thanks for your input !