All Notam Plot needs is the data in a text format. Surely this must still exist for flying clubs etc who are not online.
All NATS have to do is have a page with the docs in the old format somewhere accessable on thier web site. It is very easy to repoint Notam Plot to another web page.
Saying this, if anybody knows of a web site that has the info in text format. Can you please mention it. Problem solved
I don't know if Ian Fallon ( creator of Notam Plot ) reads these, but if not, I'm willing to have a go at converting the Notam text to something the software can use.