Hand out flyers and post bright signs in the area. Ask neighbors if they can look in their garages/sheds. Go out at night w/a flashlight and early morning hours to call for him when it’s quiet. Put a box with scented clothing in it in a garage with the door open just enough for them to get in. Canned cat food, tuna or chicken for smell. Check often overnight too when they like to wander. Check warm car engines. Post on nextdoor too. Notify animal control, camp companion and paw and claws for them to post as well.