3 Ace Crafts Extra Large Inking Tray Rectangular Single Plastic Paint Palette for Kids and Adult Painting Holder Paint Mixing Palette for Watercolour Oil Painting Art Work Pads of Robust Material :
Albany Paint Tray Liners (Pack of 5) 4"
Flat paint tray - Manutan.co.uk
NESPOLI Standard 1.5 Litre Flat Paint Tray for Roller 180mm : Amazon.co.uk: DIY & Tools