Ayaguasca, magic mushrooms or something similar.

Unless you'll find some enterprising sould who imports Ahuyuasca from the Amazon, you'll be hard pressed to find it in CA. The vine doesn't grow here.
CA's not big on natural psychoactive substances. Wanna do what the locals do? Try crack.

If you don't want to get hooked on crack or powdered cocaine,
marijuana is non-addictive. I have found a couple of cold beers
and a cute young local can provide a very satisfying experience
at a bargain price.

Informative site http://www.ayahuasca-info.com/exp/ Read an interesting book called Trail of Feathers this winter about ayahuasca that Xinloi had recommended.

you'll probably find a lot of people that want to sell you something, but I think you pay, probably too much, for nothing

thanks for your time.