Here's the link to the carrier that both Bob and I are using:
https://www.stowaway2.com/hitch-frames
They aren't cheap as compared to something you can get from HF but they are very, very well built.
We each bought only the frame (well I bought the hitch lock too) and then added our own boxes. You can buy a complete box and hitch from them and they look wonderful - I've seen them up close in person, but they are kinda expensive IMO.
I added the same Husky Tradesman box that Bob already had on his fixed carrier. It's about $70 at Home Depot. After I had it all mounted, I found much nicer ones made of diamond plate at Tractor Supply. The Husky box is deep enough that everything is three layers deep in it and it doesn't take all the widthwise space that I have available on the back of the van. The diamond plate one I saw was shallower but longer so I wouldn't always be digging for stuff in the box and I'd be able to strap my 10'x10 shade canopy on the top.