if anyone hasn't told you this yet, the plants required to make ayahuasca (plants containing high dmt content) are not regulated in North America and thus freely available for you to purchase online.
You say you've done dxm........ dmt should not be a problem for you. It'll get out of your system quite fast, the body knows how to metabolize dmt. I'm just saying, it's not a physically dangerous substance. And if you are going to take deleriants for whatever insane reason, stick with dxm. At least it's not as crazy damaging as datura, though it's still pretty bad.