To my knowledge only one car was built with the 4.4 engine and this was registered as an Aero 8 and had an aero chassis number. Aeroman, then Mr Tony owned Aeromax No 1 which was a 4.8 and was the original Aeromax.
I did look at buying this car some time ago at that point in time it was straight but had is pointed out in the ad the car was written off by someone's son.

Reading the ad I'm not convinced you'll be getting anything but pictures of the car.
Regarding getting this back on the road now I don't think it will ever happen, new chassis, front end, engine etc. Especially when you consider Aeromax prices really haven't moved on in the same way as many other classics.