Navy duvet cover with white monogram initials

I lost my navy duvet cover from a queen-size Brooklinen set yesterday around 3pm. It’s 100% cotton, soft and a bit faded from washing, with a white monogram 'A.J.S.' stitched in the top-left corner. I last saw it on my bed in my Brunswick apartment, after I stopped by Maine Street near the Brunswick Mall and headed out to a cafe on Park Row. It’s sentimental because it was a gift from my grandmother, and I’d really like it back. There’s a tiny coffee stain near the zipper to help you spot it.