Another part that I had been trying to track down (& to find the original source of) was the twin-jet windscreen washer nozzle fitted to 904's :
http://farm8.staticflickr.com/7076/6...fd8e6c2c_o.jpg
- nobody seemed to know which vehicle(s) used this & I have been unable (so far) to find one.
The closest I've found are these similar - but single jet - nozzles from an early VW Bus:
http://farm8.staticflickr.com/7082/7...320b1d08_n.jpg
So I ordered a pair & asked 'my' machinist to remove the jet from one of them & drill/insert it into the other ... which produced a suitable alternative until I find an original:
http://farm8.staticflickr.com/7242/7...6d551332c3.jpg
- some silver/chrome paint on the brass jets should complete the effect.