If Jah is still unfixed, then you could significantly reduce how much he travels by getting him neutered. Neutered male cats have home ranges 1/2 to 1/4 the size of unfixed male cats. Otherwise, I would consider fitting him with some sort to tracking device like a GPS or radio-collar. That way even if he did wander, you would have a much better chance of locating him. You can find more info on cat trackers here: https://lostpetresearch.com/2011/01/gps-versus-radio-tracking-pros-and-cons-for-finding-cats/. I hope that you find him soon.