After being told by Givi that the Givi E21 can not be fitted to the Zero DS and the parts listed by JPaulus could not be ordered anymore I called Harlan at Hollywood Electrics and he ordered everything that was needed and I installed the Givis last night.
The install was pretty straightforward but there are a lot of variables and everything is adjustable so it took some time to tweak it to my taste. The hard part is connecting the support rods to the rear foot peg mounting holes on the inside of the frame. If I had my exact fit I would scoot bags back another couple of inches but this could not be done without some bracket fabrication.
I really like the end result. Light, solid, weathertight and easily removable. Capacity that is good for commuting and style that complements the DS. I can add a top trunk if needed and the Givi plate makes a great top rack for strapping to if cargo needs exceed the cases.
Here are some really bad dark pics from inside my garage... sorry , raining here today. I will post some better pics tomorrow if the sun comes out.