Here are the links for the screens from Calumet. One is the screens and the other is the stand, if you don't want to build your own.

I believe there a number of Calumet store in the UK


http://www.calumetphoto.com/syrinx/c...&type=PRDINDEX


http://www.calumetphoto.com/syrinx/c...&type=PRDINDEX


Michael McBlane