oldschool efi
you can try locate some from local wreckers, last time i needed a L28e i found it in a laurel
united injection can do you new injector plugs .... $11 a pop they are in redcliffe or you can go to petrajet in ozzy park. Changing L series injectors lol i hate their fuel rail setup
as for an after market ecu many choices, you'll need something generic , comes down to your budget, location and prefered tuna......