Drew, thanks for the complement on the photos.
As to the basket light mount, I've had two of these for so many years, I cannot recall their origin. They were designed to mount to a frame or fork tube and I adapted them easily for the basket. They aren't as substantial as the current mounts made to attach at a frame fitting (like Paul & PDW, etc.). So, at first I wasn't sure if they would be trustworthy. They have proved to be fine and I'm sure I did not pay much at the time. Your search may prove to be more fruitful than mine.
I looked at the strap on the basket side and one says, "CRONOMETTI" the other, made to fit a different tube size, says, "ISSIMO," so your guess is as good as my own. It is very likely I got word of this from one of these forums.
Just out: PDW has a newly designed basket mount called the "Outpost Mount," made of metal (steel?) so a little on the heavy side but looks substantial enough to be able to survive the bike falling over without any damage to the light mount.
I'm headed out for an overnighter on Wednesday and hope to try it out: