Hi!
According to the distributor this secondary VI gear is slightly different so he found for me a secondhand but in good condition complete gearbox for 300€. I will have it tomorrow.
Sometimes I feel that I want to sell the bike especially after this problem with parts availability. But then generally is in great condition and set up very carefully (Ohlins fork, Pro Taper 20mm clamps, a lot of revalving to my taste, etc.) All of my enduro friends with their new bikes (including Miska Aaltonen.. ok, he is amazed of the bike.. not from my speed
) are amazed of this "old" model. I think I keep it for sometime until something really great and much improved comes out from GasGas (anyway it does not lose its value so much anymore). I'll let you know when everything is assembled and working.
Leon