Righto, this one then...
http://www.warehouseexpress.com/buy-arca-swiss-monoball-z1-dp-with-fliplock/p1027874
Looks virtually identical to the B&H one, but must in some tacit way be somehow superior - hence the 21% price premium despite Switzerland being a 90-minute flight away from here rather than NYC.
What about plates? Is there a plate to mount a DF with V-Grip horizontally? Or just got a regular length one?
Despite the name, Arca Swiss is in France.......