Supposedly the tray is $150, which is high but obtainable. But I'll probably try sanding/polishing a few sheets of acrylic from Home Depot first. Anyway, I think I found the number.U0750250-00 TRANSPARENT O. RETAINING PLATE
My latest tests are showing slightly, and I mean slightly, greater detail with my custom tray. I actually found my resolution test slide this morning, though, and so I'll have to run some tests with this.