Thanks Dan, Bob and Gary for advice. As it turned out, the fuel sender selection ended up being more straightforward than I initially thought.
Sourced the new sender from Gauge Works
Gaugeworks - Specialist Gauge Supply, Advice & Calibration Services (Albert Park, Adelaide, SA) where I was told “just plug it in and go”
and that’s how it panned out.
Here’s the sender at quarter full and gauge at quarter full (note position of float):
Here’s the sender at full and gauge at full (float is at the top of its travel):
Can now continue with the tank installation.
I'll post this on the build thread as well.
Cheers,
Glen