I'm happy to report the envelope stuffed with my ACW flags has been found. It was really not in a good place, tucked on top of a shelf in the laundry room/model storage/spray booth area.
With some luck, I'll base and flag a few ACW units this weekend. Or I should sandblast some car parts. And mow the lawn. And set up a new exhaust system for my spray booth. And start clearing out the garden. You get the idea.