There is an older and a newer version version of the Givi top case rack for the R 1200 GS in the market. The newer version disposes with the spaceship Enterprise OEM rack, has passenger hand rails from metal, and it places the top-case better.
Does look much better as well as lowering the COG a bit. I personally would like to see it in Stainless or at least power-coated silver to match the bike.