Comment by magnamerc

You can buy pre-cursors (or known as analogs) like 4-AcO-DMT online from Lysergi. They are sold as a 'research chemical', however they metabolize into psilocin so it is indistinguishable to psilocybin. Obviously you should take every pre-caution before ingesting any substance by doing your own research, and looking into the authenticity of the supplier.