Hello, welcome to the site. I have a bunch of old NOS patches from a defunct uniform company. I'll get some photos to you.
Also, there are lots of "fakes" (newly made) out there being peddled as originals, especially on fleabay. Buy from reputable dealers and other collectors.
Good luck and happy collecting.
Looking for photos, etc from 60s era Shell-A-Rama gas station and Pal's Diner, Rt. 17 Mahwah, NJ
& US or state highway signs, shields, route markers