Thank you all for your comments... but none of the suggested 'methods' seems to work with these seeds.
If they are no viable (maybe too old, maybe too dry...) there is no way to germinate them, (maybe embryo rescue..?). It is a pity no one has been able to sprout them, it will probably take a long time until we see them again in the market.
I posted this question because I was thinking to buy some again, and try an give a second chance to those species, somebody sprouted (although they have now lower viability than the first time)
What I learned from your information is that none of them worked better then other and the germinate rate was close to zero (only one M. campestris limbangensis from 100 กก)
As said, really a pity
