Thanks all.
Yes, it is my intention to swap the whole thing over to a complete new top to the tank.
You can see some pretty horrible pictures of the unit in this thread..
https://terrylove.com/forums/index.php?threads/australian-seeking-your-assistances.53683/
..it is indeed a shocker isn't it?
Because I am not too much into DYI, I was thinking a transplant was the best method, rather than trying to overhall it, thus the question on "swapability" in this case.
There is one Aussie distributor whom has given me a price of this to replace the 155 unit
Autotrol 255/762 Softener Valve - MP Control $ 537.90 Inc Tax + $ 85.00 freight...this amounts to about US$590.00
Includes the following: Valve, Transformer, Bypass Valve, Riser & Distributor, 3/4" SS Adaptors
I also got a price from a US store, and was advised ....
The NEW 255 Valve with metered Logix timer ( 760 ) is $ 329.00 PLUS $ 30.00 for 230 volt 50 Hz VERSION ( different control Board and Transformer used ).
Plus the New By Pass ( 256 ) listed above for $ 36.95 ( can be ordered / selected with the New Valve )....so that is about US$396 + delivery, US$117 freight....total US$513.00
So I was a bit wrong, there is not a lot on prices, and the item is warranted over here, and available quicker...seems to make more sense getting from here doesn't it?
Help me what to do please, and stop me being indecisive!!
Thanks...