Home Depot has this on close out for $36 plus tax. Free Shipping
https://www.homedepot.com/p/Weber-Style-Cast-Iron-Plancha-for-Spirit-300-Gas-Grill-7579/204817365
https://www.homedepot.com/p/Weber-Style-Cast-Iron-Plancha-for-Spirit-300-Gas-Grill-7579/204817365