Trying to find rare design stirrups!

Hello everyone I need some detective work. I am trying to find a certain stirrup. I can’t remember the name but can describe them. They are made in the idea of a ski. They take the full foot of the rider and are built for English style saddles. They have a special strap that comes off the back in case a fall. I can’t remember the name of them. Does anyone know the stirrup I’m taking about and the name of them?. You can order them from over in Europe where they was designed

K’Vall stirrups.

http://nattstadcdn.com/8/1100000/1070000/1067319/pics/2014112899681301067319_sbig.jpg

See previous thread;
https://www.chronofhorse.com/forum/forum/discussion-forums/eventing/147891-a-questionable-new-stirrup-design