Maybe this helps ?
Highres Scan Dodgem CPO
I have made a start to vector this a long time ago, but i never came further than the basic dimentions 
Here are the dimentions of the CPO:
Thank you for posting it, Etienne

.
I've vectorized it and you can dowload it from
here. I know it's not perfect but, being a vector file, you can edit it easily.
Piero.a, if you are going to use it, maybe doing a color correction and a measurements checking would be a good idea;).