finding origionals was proving difficult and when i came time to turbo they would not provide enough fuel any way.
i have used injectors from a straight6 jag engine (will try to find year) which have identical external dimensions and are to suppy cylinders around 600cc
they should be perfect for the 400cc cylinder of the fastback engine.
vw vanagon and some volvos are ment to use injectors with the same dimensions.
hope this is helpfull to someone