I posted some over here, it's in Dutch though
http://www.keversite.nl/forum/viewtopic.php?f=5&t=16351
(Achterkant = rear)
Is it for steel trailing arms or for 944 Alu trailing arms?
About the single shear:
It's a good point, but in the Käfercup they raced with the single-shear setup and it didn't break. And they did push their cars to the limit.