It has to be fairly recent as I know there wasn't one done for a long time and the 479th vets were in essence protecting their stories until they found the right guy.
When I talked to Kyle Riddle back in the AW days thats essentially what he told me when I was asking about it.
Haven't ordered my copy yet, but probably next payday.
There is a 370th FG History now too which adds two more 38 groups to the collection.
Need a 474th FG, 14th FG, 54th FS, and some of the 13th AF 38 groups do do histories now to complete the 38 group collection.
Dan/Slack