Your welcome

 

There is one contender [R509TQWH 65MA T3 White Panel Bulb 14V 1.2W White] on page two of this three page UK supplier.

 

Good find QinteQ, that very much looks like it!

In the meantime I achieved some bulbs already from the scrapyard but still had no light in my new headlight switch unit ....
I compared the new unit with the old one and made a startling discovery...
For some reason there was one pin of the connector not present.. The pin to "feed" the lightbulbs.. Obviously it was never mounted in the printplate in the first place. So beware there are several versions of this unit.

I took my soldering iron and removed a pin from my old broken light unit and soldered it in place on the new unit..
and VOILA! THERE WAS LIGHT!
So now it works AND I know where to get replacements

 

Good man, and well spotted, glad you are sorted.

 

I had some go bad, the replacements are at Autozone. They are not in the together view though but the job to get the wires out and back in is easy.