I hope I posted this in the right forum. It has been impossible for me to get my hands on any South American tubers. And all of the neem seed I have ordered came dry and didn’t germinate after 100s of seed and multiple techniques. I know it is fairly easy to get all of these plants in America through cultivariable and neem nurseries, but none of them will ship to Canada. I hope I’m not on a wild goose chase here. Any Canadian vendors or private backyard merchants around who are blessed enough to have these plants?
Talking to the people selling similar products might lead you somewhere, since they'd have an idea of what's out there and how to get it. I've dealt a little with Flora Exotica and they seemed friendly and helpful.
This US operation has a long list of South American root cultivars. Great tuber selection for anyone in US. They do ship seeds to Canada but varieties are somewhat limited. Maybe they will select unlisted seeds for certain varieties if you speak with them.
"may your experience be fruit for all those who follow"