Does anyone know where I can get one? Here is a video that shows that is does in fact exist: Cesur Disc Adapter auf Sram Automatix Rollerbrake Nabe - YouTube

I found it a couple months ago on some German bike part website. I tried to contact the site at the time, but was never responded to. Now I can't find it again and I am at a loss as to where to get one.

Anyone have any ideas? I have posted this in a few different forum topics as I am not real sure where the best place to post would be.

Any help is appreciated.