Gray tabby cat with white paws and red collar

I lost my gray tabby cat Luna yesterday around 3pm in Great Falls, near the Paris Gibson Square Museum of Art on 1st Ave North. She bolted from me by the riverfront and disappeared into the alley behind the old train depot. She wears a red collar with a tiny silver bell, and she has white paws and a faint crescent white patch on her chest. Her left ear has a small notch, and she has a tiny scar on her right hind leg from a past scrape. She's indoor-only and incredibly friendly, so she might come when called if you see her. Please let me know if you spot her—she's dearly loved and missed.