No, I don't know much about them.
The guy behind it is called Roc Fu, but not much info otherwise.
He's involved a lot in the Vintage Cannondale scene, hence all the Headshock stuff. https://www.facebook.com/rocfu1028
Not surprising that a few people are remaking them. The originals failed almost immediately, and aftermarket ones popped up.
I was asked last year to make a few of the little canti hangers that had been lost, and drew up a brace while I had one available.
All the best,