Thank you all for the explanations and clarification. I think I now have a fair idea on the structure, at least from the top.
Ken, you are right, it is a tough job and time consuming, but the body shop chap who is wanting to face the challenge is a highly experienced chap, semi retired and has lots of time on his hands. So I will let him have a go.
72blunblu would you oblige me by a couple of photos say from the inner side and from under the bonnet to see how they end there. Also, if you can, open the bonnet and take a shot from the side to see exactly how they ride onto the bonnet. That will really be great. Once I see those shots and show them to my chap, he can then decide to go for it still, or not
MEK I checked p. g. classic but found nothing, neither in their store nor their ebay one. If I do find the fender ones, which are the hard ones to make, I could buy them and use them as a guide for the other one. Anyway, I will keep looking
Cheers, Farouk