At last I managed to get through to Mike at VWSpeed (linked earlier). Had a long chat....Deffo an enthusiast, keen to help.
The product is exactly the same as I posted - In fact, someone lifted my photo and sent it to him!

He's checking with others how we should program the car to accept these LED's. I'm going to contact the guy who's car I photo'd to see what he did and I'll report here in due course.
So, collectively, several of us are onto it!
