would this shelf fit Store Display Fixtures SINGLE SIDED ISLAND GONDOLA SHELVING UNIT 52" tall ??White color. 52" tall x 36" wide. 6 shelves that are 7" deep. 3 of the shelves are 2 level and 3 are single level.????thank you. sorry had to change myemail (36 x 14 inch Economy Upper Shelf for Economy Units)