Please, don't give up...I am sure Eli will return...
There was an "inside only" cat missing in our town recently and the couple, who shares the life with this gorgeous cat, has run adds everywhere and they even have informed the paper, so everyone knew this cat...poor Mowgli was away for a week when one neighbor (in the same house!!!) has found Mowgli on top of a cupboard!!!

I am sure Eli isn't far away and you'll find him!!!
Eli will be in my prayers!!!