MSI Hampshire 6 in. x 24 in. Textured Slate Stone Look Floor and Wall Tile (10 sq. ft./Case) SMONBLK624G - The Home Depot
Montauk Blue 18x36 Gauged Slate Tile - Tilesbay.com
NewAge Products Slate Gray 27.6-mil x 12-in W x 24-in L Interlocking Luxury Vinyl Tile Flooring (403.2-sq ft/ Pallet) in the Vinyl Tile department at Lowes.com