Gray tabby cat missing downtown Lewiston

I lost my gray tabby cat, Milo, yesterday around 3pm. He's about 10 pounds, with a soft gray coat, white paws, and a blue collar with a little bell. He has a distinct tiny nick in his left ear and a small white patch on his right hind leg. Milo was last seen near the Lewiston riverfront park and the Main Street crosswalk, around the corner from the Star Market on 6th Avenue. He's an indoor-outdoor guy and tends to hide when new people approach, which makes me worry because this cat means a lot to me; he's been with me through a lot of moves. If anyone spots him, please reach out.