Can you purchase freebase in the US anymore?

I don’t want to break any rules around sourcing, but since the freebase itself isn’t illegal, i figured it’s ok to ask. I’ve read the extraction process off the DMT Nexus. While i’m sure i could pull it off, is there a place that sells premade freebase harmalas extract? Older posts say Amazon but that no longer seems to be the case. Thanks!