I've traced a new CPO from my repro overlay - here's the AI file. The lower part was from another file, I just did the top part. The control holes seem quite off, but I've left them as they are on the repro. Also, the colours I've used are not the same as the flourescent ones on the repro - I'm not sure what colours these are. Background black CMYK is 30/30/30/100 but this can easily be changed.
If anyone needs anything re-jigging or whatever, I'm happy to do so!