Ended up getting one of these, scored it brand new off facebook for $50 and then got another gauge from a ute that was going to scrap.
Have bought a vnt turbo to go on my rodeo, its a gtd2056vkr from a ranger. I will need to change the actuator to a vacuum operated one but undecided if I control it with a dawes valve or one of these vnt boost controllers
https://www.tuning-diesels.co.uk/digiboosters/