Turns out that the short extension housing is unique to Aussie escorts - UK readers on another forum had never seen one like this before!..
Ended up buying gearbox (not the one shown but a different listing on TM) c/w bell housing, fork, bearing and driveshaft. Unfortunately, bell housing had been modified and will require some welding to recover - maybe replace with alloy one
Just got to sort out a gearbox mount now. Was told an auto gearbox mount will fit straight in. Can anybody confirm this?
Thanks