It's a pretty difficult task and I've never heard of it being done. And because in the difficulty of duplication, I'm not sure how much precision will result. For background, electrical resistance strain gauges work because a conductor undergoes a slight change in resistance as it is extended. When secured to the item being tested, The wire will stretch/compress when the testing item is strained. The change in resistance is measured using sensitive equipment, or a circuit called a Wheatstone Bridge circuit. To correct for lack of alignment, etc. strain gauges are often placed in a pattern.
To manufacture one, a length of very fine conductive wire is required. This has to be laid out in a 'zig-zag' (like a multiple 'S' but with numerous back and forth wires. This permits a length of wire to be placed in a much shorter length. This is where the bigger problem will occur because the bends in the wire are at the ends, where there is little strain; bending the wire increases the resistance. This wire assembly must then be transferred to the object being tested. As a guess, the area on the tested object can have a 'glue patch' and the strain gauge can be transferred on adhesive tape. It won't be an easy undertaking.