I have kept in touch with a few. If you do a search there may be a group that has a link. I am a VFW and American legion member -- every month there is a part in the back of each magazine that you get with membership of somebody trying to locate others from same group or notice of reunions. The groups like them have online web sites and may have contact or link info.
I tried to find a dear friend fo several years to no avail but finally tracked him down on a website he was using. It was kinda ironic because I took my young son on a dove hinting tip about 200 miles from my house and the place we were to hunt had all the motels booked up for dove season so we wound up in a town about 20 miles away in a Bed and Breakfast. I later found out that the friend I had been searching for lived one block behind the Bed and Breakfast in the small town .If I had know this I could have walked down the road and visited with him. LOL