I was perusing one of the articles on the front page of the site (this one: https://www.largeformatphotography.info/heads.html ) and it mentions a Bogen hex QR plate that is actually 4 inches square for stability, but mounts on the standard hex quick release. No part of model number is given, and my searches have only come up with people saying it exists, but no part or model number, and no picture even.

I currently have hex plates on my Technikardan and my Technika. On the Technikardan the standard hex plate is less than ideal, and something that has a larger contact surface would be nice. Does anyone know any more about this hypothetical QR plate? If I had a part number, even if it was no longer made, it would be easier to find one.

(If it matters, I'm currently using a 3047 3-way head on a 3021 tripod.)