Navy-white queen duvet cover set

I lost my navy-and-white striped queen duvet cover set yesterday around 3pm. It's a lightweight IKEA duvet cover with a zipper closure and comes with two matching pillow shams. The set is in decent condition but one sham has a small coffee stain near the corner, and the bottom hem has a tiny tan thread repair I did myself. I think I left it in the parking lot behind the Safeway on Broadway in Eureka, Humboldt County, near the riverfront. It was a gift from my mom, so I’d be really grateful to get it back.