Amazon.com: LEGO Parts and Pieces: Dark Gray (Dark Stone Grey) 16x16 Studs (4.8 inches by 4.8 inches) Plate x1 : Toys & Games
Lego - plaque 16x16 mauve (lavender)
Lego® 91405 Baseplate 16x16 (medium azure)
Amazon.com: Brick Loot 10 Pack Compatible 5 X 5 inches Baseplates 16 x 16 Studs 16x16 - Variety Base Plate Pack Includes: Grey Green Blue and Tan, 100% fits Lego : Toys & Games