Factory EFI
Datsun made a factory EFI manifold. See EGI#Intake.
click for larger pic
Buffalo
Buffalo made an aftermarket manifold for their South African-made ATV project, now since discontinued.
Danie van Vuuren supplied all the fuel injection components for the Buffalo ATV project. The intake manifold is custom made & high quality. Price about R1800.00 as of September 201 for the bare intake manifold. Danie can supply you a complete setup or just the bare manifold.
DCOE Conversion
Many EFI kits are available for a Weber DCOE carburetor manifold.
See EFI