Like Florida, you will need to order some bark online, I suggest KT botanicals (not the cheapest, but great quality - some vendors sells other species as mimosa).
That step is totaly safe, as it is also used to make medicines, soap, shampoos etc... i.e. is not controled or monitored.
Then you will need to extract it yourself... which leaves you with peace of mind of haveing unadulterated spice.... There is nothing worse than wondersing "what was in there" when it seems you pass the hreshold between life and death.
P.S. there is a whole tek I posted on here, with the whole explanation of what to do. It is for beginners. It gives lower yields than the xylene teks, but it also has much less of the other alkaloids (jungle spice), which can be the source of some hectic trips. The white Naphta stuff tends to be very serene breathtakeing moments of "No fucking way, awesome, that is impossible" etc.
Once you are more experienced you can do the xylene tek, then go a step further and recrytalise the DMT in Heptane to form giant clear glass shard crystals of extreme purity... obviously a large part of the yield is lost as impurities (things that are not-DMT)