Lost: small black card holder with a metro card near Lumphini Park

Did anyone find a small black card holder near the gate of Lumphini Park on Thursday morning? Inside is a stored value card for the MRT, which means Mass Rapid Transit, the metro, and a library card with a bent corner. The money on the metro card is small, but the card is what lets me cross the city without queueing for a ticket, and rush hour makes that matter. I will check this board again on Sunday.