Solved with a Meter Match Fuel Tank Sending Unit/Fuel Float Adjustmet

If anyone has an old broken sender laying around, unwrap exactly10cm of the wire and measure its Ohms with a good DMM. Report back and we can use those figures to find a wire guage that will work for a rewrap of a stock board. If I can get a stock board (or dimensions) I can 3d print one (or 20) in PP and supply them wrapped to rebuilders. PLA and ABS will swell and dissolve in fuel environments.