So, after a LOT of googling and many hours, I found these.
https://geparts.se/en/rebuildingkit-...mondeo-iv.html
So I've ordered them. Wait and see now if I'm asked to pay more for shipping, it was very cheap!
The description states they are to replace Ford OE part numbers 2373325 and DG9C-18K077-AED. It appears the part number used by Ford Australia for the shock is the second one. Confirmed from this photo
https://www.gumtree.com.au/s-ad/clar...at-/1262192222
Along the way found some useful websites
https://ford.7zap.com/en/car/180/no/0/2778/20796/ (Technical diagrams and part numbers, possibly UK/Euro specific, useful if you have to order from there)
https://www-etisorigin.app.ford.com/ (this gives you technical data on your car. When I put my VIN in though, it just told me what the model and engine was, nothing else. According to TalkFord Forum it should provide a comprehensive list of part numbers. I might be doing something wrong, or maybe it doesn't work for Australian Fords)
https://www.talkford.com/threads/mon.../#post-3188663 (gave me the above links)
https://www.der-ersatzteile-profi.de...mpfer-a4973425 (german parts store that lists up to date OE part numbers and equivalent older ones)
Anyway, thanks for the help with this. Fingers crossed the kit arrives and works. Watch this space............