Orange-and-white hamster with blue harness

I lost my orange-and-white hamster Mango yesterday around 3pm near Jackson Park Market on Main Street, by the riverfront trail and the old red clock tower. He's a tiny guy, about the size of a tennis ball, with a blue harness and a little silver bell that jingles when he toddles. He has a small white patch on his right hind leg and a tiny nick on one ear, which makes him a bit easier to spot. Mango is a rescue I adopted last year; he's super social but gets anxious when he can't find me, so I'm really hoping someone spotted him and could bring him back to the house near Oak Street. If found, please contact me right away; there will be a reward because he's dearly loved and has sentimental value to me.