In addition to our PCB Engineering capabilities we also provide a service to reproduce PCB.
From the gerber data. If you are working with CAD data in a Gerber format, Virya Infotech can "Reverse Engineer" it for you. Reverse engineering is the process of starting with Gerber files then adding part and netlist information, to create an intelligent database, which can be brought back to any CAD system.
Simple method of tracing the paths on a double layer circuit board involves taking a high resolution picture from a mounted camera at a fixed focal length. This is to ensure that when taking a picture of the top and bottom of the board the dimensions are as close as possible.