hi binbag (ralph)
 
have you tried tamiya xf59 or xf60
 
Danny

Thanks for the help Danny - I bought a couple of paints in my lunchtime at Modelzone in Holborn (handy working in the city), and the best match I can see is Tamiya XF60. I looked at all the Vallejo and Revel colours aswell, but the Tamiya colour still looked the best. So I will give that a go this week.  
 
Of course as soon as I do paint it, someone is going to say "That's not the correct shade of dunkelgelb".
 
But I have a cunning plan. Reading an article on the Internet, I found that dunkelgelb varied a lot considering how much the paint needed to be thinned, or how much they had in the factory. It was apparently mixed with all sorts of junk to make it go further, and this affected the colour. So if anyone says anything, I'll just say it had a lot of dodgy solvents in it!!!!!