Cuisinart 36 in. 4-Burner Gas Griddle Cover, CGC-360 at Tractor Supply Co.
Amazon.com : 17“,22”,28“,36” Hard Cover Hood Compatible with Blackstone,Hard Top Lid Premium Accessories, Keep Griddle Top Clean,Protect Front or Rear Grease Griddle (Black 17" for Blackstone 5010) : Patio, Lawn & Garden