We lost one of our Cats too.. LMAO come to find out, she ran in my daughter's closet and hid in there for about 8 hours.. I was so scared... While looking for her I noticed a small hole cut in the wall to fit some pipes that she could fit into... I thought she squeezed in there and got stuck in the walls....
All in all happy to hear you found your little guy... If mine ever got out, I am almost 100% sure I wont get her back Alive... for fear that one of the 2 cats (or both) will stress her to death..