Have you seen my Frankie?

My tortoise Frankie was stolen from Tortoise Acres Sanctuary in Northern California in May and I've been looking for her since. She is a 25-year-old Giant South African Leopard Tortoise. I don't have weight & measurements, but she takes two hands to pick her up (pretty good size).

Her most distinctive mark is where they wrote her name on her shell just above her tail. I am offering a generous reward for her return.

I am heartbroken someone would do this. If you have seen her or have any suggestions, ideas, feedback on how I might find her, I would appreciate it! I know you can imagine how much I want her back.

Thank you for any help you can give!