We do not need perfect drawings in order to make your parts, there are several ways you can provide the information we need:
Visit
If your based around the Solent we can visit your boat and take all necessary measurements, and produce the parts you require
Mock up
Make a model of the part you need in wood or card and we can duplicate it in steel,
Photographs
Seen something you like on someone else's boat? Even a different type / class of boat. Send a picture, we can advise on the critical dimensions we will need to take from your boat and work from there
Sketches
'Back of an envelope' is often more than adequate, we can advise you if any additional information is required