You could try Kevlon Tints in Bexley Village.
Did a good job on mine, 30% sides and back in light blue but had a few colours to choose from.
Removed all the glass so could put into a warming oven overnight.
Although I am not a member of Kent Scoobies I am going along to Fox's as I only live 2 miles from them and then staying with the convoy till Lancaster.
I have the official stickers and polo shirt, so see you at Fox's.
Andy.