The correct part number is 025 129 607D.
There is allegedy one in the US of A for $154 plus astranomical postage.
Or I can get a used DJ housing for approx £40 and cut n shut it into my DF housing.
I did look at other vehicles such as 90s Vauxhalls, that used Bosch air flow meters with the same four bolt mounting footprint.
Mainly the 18SE, 20NE and C20NE engines, but the meter is mounted in the wrong direction.

Modifying the air-box mount for the DJ is an option.
The whole thing would have to move 3" (7.5cm) rearwards, roughly.
That would allow the water pipes to fit with the early elephant's trunk... just about.
More research required -
