Andy,
Agree with what Colin says and I think you might be better getting a good pattern and I think Cake Street Roger Sharman does them and he is usually outside at Stafford.
I have a spare mudgard which is solid but will require full restoration, drill holes filling in to suit etc
I decided to use chrome guards on mine so dont need it.
I will be going to Stafford so I could put it boot if you are interested.
Regards
Stuart