I had the dealer put one on before I picked mine up... seemed totally ludicrous to NOT have a centerstand on the bike. Nevermind that BMW thought it looks better without. It is the same stand as on the 'regular' Rockster and R bikes.
Just bite the bullet and have your dealer install it,,about $250.00.If you order it new as an option its only $100.00,,,I found out too late.If you are good with tools you can install it your self,check out the on-line parts fichs at MAXBMW,there are like 20 parts to this thing.
The centrestand is strongly recommended -- like all BMW stands (my 15 year old R80 is the same) it's really easy to use ... just a bit of downward pressure and a very gentle heave and it's safe and sound!