When I went to Historicon this past summer I ran across Dave's Baggage Train. Owned by Phillip. Dave's Baggage Train
The first thing I noticed about these trays was the nice plastic they were made out of and how the trays are durable. I have plenty of the Army Transport trays made from foam and most of them have come apart at the seams. Literally.
There are several types of trays, the ones I bought were 2" deep and plastic. He also has some made of wood.
The other nice thing is the price point. Dave's trays are $6 a piece (for the 2" ones) compared to the $11 or $12 Army transport trays.
Here's a shot of the army transport tray inside the Dave's Baggage Train tray. The length of the tray means you can't use the army transport bags. Since I've invested a lot of money in the army transport trays I will keep using them to store my figures but use the Baggage train trays for transport.
These are 1/72 scale tanks in the 2" tray. There are other accessories you can purchase as well like tray liners, magnet sheets and so on.
Give them a look and see what you think.