Jerry Miculek's J point mount on Benelli

I was surfing channels tonight and came across one of the shooting shows on the outdoor channel. Stopped to watch Jerry blasting some stuff and noticed his Benelli M2 had a J point mounted back behind the receiver.

I searched around and came up with this link to his stuff.

http://www.bang-inc.com/store/index.php?main_page=page_3

There is also a much larger pic of the mount here that I’ll link to so’s not to explode people’s monitors.

http://www.bang-inc.com/images/gunsgear.sgloaderoptics.large.jpg

So the obvious question is does anyone know of anyone producing this base for Benelli’s, Remingtons, Mossbergs? If not any ideas on affixing something to my already existing single point sling plates?

Looks like the insperation for the Burris Speedbead

http://www.burrisoptics.com/speedbead.html