Since then I have searched the internet for this, however could only locate it in the US. I was going to ask my local Pfaff dealer about this, but as luck has it, when I went to the Australian Machine Quilting Festival the other day, my Pfaff dealer had a stall and they already had them in stock.
Exciting plus...put it on the same day to finish off my meander on the Plus quilt. The shank of the Pfaff Machine looks like this:
This is the modified ankle:
The visibility is greatly enhanced as you now do not have the lower piece obstructing your view while you FMQ .
The drawback is that you have to exchange the shank when you want to FMQ, of course...a bit fiddly but a small price to pay for the constant looking around your foot to see where you came from. I like it!