Thanking you Asterix.
I really cant remember, although I did get it from ebay....the first lot came from a guy in cornwall but the packaging was crap and it had gotten creased. I then purchased from another seller who gave lots of advice on a leaflet, I think that it cost me about £20 in the end and have done all of the windows. It really needs a lot of patience, I made templates of all the windows first with lining paper and used the templates to cut the shapes of each window.
Better to do before or after the beer