Well, its sorta homemade. Not very pretty, but functional.
Its actually a mac or matco socket display rack.
Please forgive the huge mess, I recently became unemployed.
The guy, a really good guy btw, is more or less retiring. Doesn't have enough work for two people anymore. Which is a bummer, but I can use his shop pretty much whenever I want so all is not lost. Anyway, after about 25 years of working for other people I trying to give it a go on my own this time.
So far all I have is a huge mess with tools everywhere. Trying to do jobs without getting set up is horrible, but I'm making progress.
Anyway, the rack can fit 12 racks of sockets in a fairly small area and gives easy fast access to them. It also leaves the space open underneath for your various whatnots. Can also put 4 more shorter loose individual racks on it without getting in the way of the others.
Only downside to the rack is it wouldn't work out unless you are in a trusted environment as it sticks up fairly high so no lid. I could lower it some, a couple inches or so, but that would make accessing the lower row harder.
I suppose if one had the capacity, time, and desire they could make a deeper top to take care of that. However, right now you can access most of the stuff on the cart from any side and a lid would interfere with that.