I want to know too. I would like to buy some shares, put them in a box and save them for my grandchildren. Seems the very definition of a long play to me.
Ask around in the private equity markets. They usually don't want to deal with small fry like me, but I was relentless :-) These things are very high risk, so I don't really want to be blamed if things go awry for anyone. I suggest starting with asking your brokerage.