Hi Guys,
Since I was the one who started this thread way back in 2020, I thought I should update - SUCESS!
After reading the posts here (thank you), I ordered the conversion kit from Geparts in Sweden.
https://geparts.se/en/conversion-kit...-mondeo-i.html
They were super helpful and it arrived here in about 5 days $670 delivered.
Fulcrum Suspension in Capalaba fitted them, no problems for $625
Definitely the car feels much better, and problem fixed for say $1300 (compared with probs more than $3,000 for genuine Ford self levelelling suspension).
Wil recommend this solution to anyone with a Mondeo wagon. Apparently Volvo's have the same problem, hence the solution coming from Sweden !