Ouch! I'm looking.....
Ok. The company was/is called Badland Bumpers, and their domain expired about a month ago. They were only like $15 cheaper. I'll keep looking. I myself have to either fab or buy these soon. Might just make them myself.
Not that Jim doesn't have "enough on his plate right now", but that guy is in Houston, so maybe Jim should talk to him, and then he could offer his Hi Lift Adapter as an option when you order a set of Shrock sliders.
Or, if you or a friend have some basic skills and tools, you could make your own adapter. It doesn't have to be metal - a solid block of plastic could be used.
I bought one(wabFab) and have not used it yet. Got the bare steel and painted rustoleum on it. I understand the need to save money but also look for quality and safety. So I went with one that has been around for a while with no apparent bad talk.