Agfa Copyjet OHP is available from jigsaw24.com in the UK. I'm using it successfully for pt/pd negs.
Thanks for that, I had a look at the Copyjet, although it's buried deep on their web site. I'm interested in the Permajet product because it is also available in A3 sheets , which I will need if it works. For the moment I shall experiment with the A4 size.