Amazon.com: Unvert Paint Tray and Liner Set, Set Includes 9" Reusable Metal Pans Tray & 10 Pack of 9" White Plastic Paint Liners, Paint Roller Trays, Set for Household or Construction Use :
Draper 34698 Disposable Paint Tray Liner, 100mm, Pack of 5, Blue - Amazon.com
Uni-Pro 230mm Paint Tray Liners 400025 - Hardware & General