To the person who suggested we check garages, yes, we've been contacting neighbors and asking them to check their shed, etc. A kind neighbor has really stepped in and helped, reaching out to those she knows in the area.
I spent three hours searching and passing out flyers at community bulletin boards. Went to the humane society again, and a friend went to three other shelters and passed out the flyers.
I can't stand being in this state of limbo. I have a little time to search before it gets dark again. Tucker kitty, we sure miss you.