[LargeFormat] Ground glass or etched

[philip.lambert]

I am having difficulty getting a replacement focussing screen in the UK for
a Speed Graphic and a Century Graphic. Mr Cad has kindly offered to sell me
an old screen to cut down but old glass is brittle and tricky to cut, even
though it involves only straight line cuts here.  The alternative is to
import a Boss screen which would work nicely when eventually received but
glass is cheaper, when you can get it. The only possibility I have heard of
is 2mm sandblasted, an example of which looked very white and I can imagine
how dim an image would result.
 Does anybody know a source of new glass in the UK?   Thanks a lot.  Philip