The LNER Encyclopedia

I'm currently looking to expand my Gresley coach collection, but with my small budget I would only be able afford the old style Hornby teak coaches (and do them up as in my previous thread) but the thing is all the ones I can find all have the same running numbers as my current ones, so I was wondering;
a) are there any companies that do dry numbers transfers and,
b) does anyone know what the Grelesy coaches running numbers went from and went to and what number was on which type of coach?