Typically I'd just bought a Givi monorack for my 900 (yes - one of those, "I might need it one day purchases).
When after a good bout of browsing I found a lovely tiny Givi rack called the 'porter'. It seems to replace the grab handle unit and might not look too - unsightly.
It appeared that they were not being made anymore but maybe I was wrong or this guy in Germany managed to find a new one.
He will post to Europe it appears:
SS Tail Rack 
Not sure if it will impead (even more) access to the seat lock or not?
Frank