I have exactly the same problem with my fan switch. The plug has been cut off and four spade connectors connect to the switch on the bottom of the rad. I went round the scrappies and had a look at other escort and they were different. I even had a look at sierra's and granadas with a twin fan set up and they are different also. If you find out where to get the plug could you let me know please and i will do the same if I locate one.

Neil