Pilkington Glass is good ... look up on the web pilkington automotive glass, they do classic special glass, all stuff up to 1950's, even for Lamborghini and rare Jaguars too ............. they can impress the Triplex logo or whatever brand the original glass had ( they own the marques i guess ).
I visited the factory the other day on the hunt for summat, very impressed, thousands of moulds for all ages, quite incredible what they do there ( in Queenborough Kent ) where I live too !!
Malc