Johan I recommend you to look for organic silicium G5 (fifth generation).
There are one company that sells organic silicium "G6", but I think they have "invented" the name "G6"to look like as "better than G5", but 6th generation seems to not exist... so don't trust much of them
There are another type of advanced organic silicium: Si-Glycan-3. It seems only one company sells it, but at least seems they look like more serious than the "G6".