Amazon.com : Microgreen Tray Grower Starter Bundle 10 of Each - Extra Strength Microgreen Tray with Holes, Shallow 1020 No Holes, and Humidity Domes : Patio, Lawn & Garden
6 cell garden propagation trays from Modern Grower (products forum at permies)
Amazon.com : Gardenstuff Seed Starter Trays 100 Large Cells Plus 20 Bonus Cells (20 Trays of 6 Cells Each) + 20 Labels : Patio, Lawn & Garden