If you can read the # on the front of the lock you may be able to order the key through this link.
https://www.easykeys.com/329_Steelcase_FR301-FR800_Lock_Keys.aspx?shoppingproductad=1&gclid=Cj0KCQjwhb36BRCfARIsAKcXh6HvAf3bsEJUBPmRUBYC0foU0IvGg5sJLc7MN_VrZ4e0KeLJDLp0NUwaAjOVEALw_wcB