Yes, rareseeds.com is a great place for heirloom seeds and funky seeds/plants you can’t find elsewhere. Most of their stuff has been “tamed” but they will mention if it’s not ready for farming type cultivation.

They have an ancient watermelon that’s been breed to taste good. I’m going to start growing Paw Paws this year or next.

Go hiking with a field guide for edible plants or someone knowledgeable.