Lost & found miscellaneous musical items in Salina

Lost sheet music in Salina, Kansas

I lost my sheet music this afternoon after a rehearsal at the Stiefel Theatre in Salina, around 2:15 PM. The folder is a light blue cover with my initials 'M.R.' on the inside and a few coffee stains along the corner. I walked through the lobby, down the side stairs, and out onto Santa Fe Avenue, then back in and around the seating area, but I couldn’t find it. It’s irreplaceable to me because it’s from my late mentor, and every note reminds me of long practice days there; I’d be grateful to anyone who hands it in at the front desk or keeps an eye out nearby.