Gray tabby with white chest, lost near St George Park

I lost my gray tabby cat with a white chest yesterday around 3pm near the St George Town Square fountain on 5th Street. He’s a medium-sized guy with bright green eyes and a tiny nick on his left ear, plus a white patch that runs from his throat to his belly. He answers to 'Milo' and tends to wander, but he’s usually friendly once you call him over. I last saw him slip into the alley behind the bookstore on River Street after I grabbed a coffee at the corner cafe. This cat means a lot to me—he’s a part of my daily routine, and I’d be incredibly grateful for any sightings or a safe return.