Well I will not be restoring the blouse, after checking out the tail of the jacket, it would require additional cloth to added. This would not be in keeping the piece to specs. If it had been an issue of re-installing some hardware I may have attempted it. Since it can not be done correctly with original parts and materials, I'm not going to do it.
I notice that in the thread on trench knives in posting #24 there is a close up photo of the pocket on a blouse. It appears to have a rimed button.