I am the person who started the discussion on YPG. i don't have time to research all of your links at the moment (at the public library) but if you are suggesting Febi is a reboxer I'd disagree based on what I know (which is not everything). While I only got the info that they make them for BMW from one online review, I just ordered the (hopefully correct) Febi couplers from Pelican Parts, a trusted BMW supplier and they say Febi are the highest quality and always made in Germany and they have never had a complaint. Since BMW drivers use a lot more than Previa drivers, I took that as a pretty overwhelming endorsement.

I ordered the ones referenced http://zenseeker.net/Previa/PreviaMa...DriveTrain.htm

BMW apparently use two Flex Discs which were very similar in size to the Previa coupler:
BMW 26-11-1-225-624-M57 is the smaller 78mm diameter Flex Disc with 10mm Bolt Holes - this is the one you want

I sure hope those are the right ones because they were supposed to put them on today on the van I'm in the process of buying.