Hi Dominik, yes it is still available. This photo I took today with my Rollei 6008 AF camera.
I'm using this digital back with my Rollei 6008 AF camera and this digital back was also used before with a Rollei 6006 camera so I assume it should be fine on all 6000 rolleys if not I can include my old Rollei 6006 body for extra £100.
I also have an Apple PowerBook G4 laptop with installed Sinar CaptureShop - the laptop can be included for extra £300.
As you can see on these photos below I have all the original cables and accessories including Sinar's Unplugged M-Top Case (552.11.000) and Sinar Adapter plate (551.43.243) (which alone was listed at BHphotovideo for more than $800).
Should you have other questions - let me know.