Hey man, I just want to make sure you know what you're asking for.... people have been working on producing stable, low THC high CBD cultivars for a decade now. There are very few seed populations that will provide what you're asking for and i can say 99% of those seeds are in commercial operations only.
Finding something like this for free or for trade is going to be a frustrating endeavor. Contact a dude named socioecologist over at IC. Not a guy I'm friendly with , but he has what you're after. Won't be free though.
Good luck to you man.