Amazon has the Ravensburger Sort and Go Jigsaw Puzzle Accessory $5.99 + Free Shipping w/Prime
What you get - The Sort and Go puzzle accessory includes 6 stackable sorting trays and is great for jigsaw puzzles up to 1000 pieces and makes a great gift for puzzle lovers of all ages. Each tray measures 7.5" x 6.5" x 0.75".
Easy sorting of puzzle pieces - Separate puzzle pieces by color, pattern or shape into the 6 sturdy sorting trays for quick, easy access.
Link them - Link the trays of this puzzle organizer or move them around the table from one person to another.
Stack and store them - This uniquely engineered stacking system with indented ridges provides a perfect solution for compact organization, and the trays nest perfectly in the box for secure storage and transportation.
Easily Expandable - If you get another set for puzzles with higher piece counts than 1000 it's easy to combine them!
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