This is something that is more relevant to our cousins over the pond but here goes:
I have been in correspondence with a company called Classic Reproductions who hold stock of quite a lot of the stickers and plates that are fixed to our cars and am pleased to say that we have a go ahead for the little black with white print sticker that is fitted to the bottom right hand corner of the binnacle.
I'm not sure how long the lead in is but hopefully news will follow.
I will try to post a picture of what is on my car but if you need any more info the companies details are as follows:
www.classicrepro.co.uk
Cheers
Ian