Quick update. I picked up a set of metric and sae 1/2" holders for my impacts and shallow 1/2" chrome. I really like the trays. They fit perfectly in my top drawer heightwise. If you don't have a deep drawer, they might not fit. I will be getting the 3/8" and 1/4" later.
On a side note, I grabbed the "tool shop" version of the 1/4 socket holders for my 1/4" Proto impacts. No good. The impacts wouldn't fit correctly. I tried it with my Gearwrench 1/4" chrome deeps and the largest size wouldn't fit the tray, either. I will be returning the socket holder so don't waste your time.