AU III Wagon - Easiest way to replace fuel sender

[XESP351]

Hey all, new in here, will do a proper intro once i take some decent photos of the wagon.

In the meantime i need a hand with the dreaded fuel gauge/sender problem that seem to be very common on AU wagons and utes. The fuel gauge is doing some weird things and after a lot of reading onhere, seems that the fuel sender needs to be replaced.

The fuel sender is obsolete from Ford (you can buy the pump and sender assembly for $370, though). So I have two questions:

- Can I buy a brand new sender from anywhere else that have reproduced it Repco etc? Or do I have to now resort to either ebay or second hand?

- Once I do get my hands on a sender unit, how do i change it? Do I have to drop the tank to access it or is there an easier way on a wagon. There is lots of info on here about replacing the sedan one but not the wagon, any ideas?