reed canary has never been used by any culture before as far as i know, some folks have done extraction to get DMT but that is not ayahuasca

MHRB also has never been used in traditional ayahuasca

But chakruna and Chaliponga are both used indigenously as visionary additives to ayahuasca

maya enthobotanicals in Europe is a great site, icaros DNA is a great one from south america and kt botanicals is in the USA