I have a very good quality photograph taken of a military oval shako plate. Plate size 92 x 68mm, I need to get this made up as a 3D plate in brass as thin as possible.
Are you able to link the picture and I may be able to give you some advice. I do basic CAD work and also do 3d printing. Clearly someone far better than I would be the choice for getting this done but I may be able to help initially.
On the plus side, a printer can do brass and can do layer heights less than 0.01 if needed!