If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
I am selling a Cable Switch L that I used with an RX, but I believe it works with the G series, too. I am in the US, though. If shipping cost is not prohibitive, you might be interested. You can view it on my pbase account: pbase/rtallent/contax_items