Ken of Hudson Valley Seed Library recently left a comment here, and I’ve since had a brief email exchange with him. He has a nice arrangement for people living in the US Northeast (probably not where a lot of you reading this live), where you become a member then ‘check out’ seeds like a library book. The idea is you replace the seeds the following year with seeds from your own garden.
In particular Ken mentioned they are doing a lot of work with dehybridizing commercial F1 hybrids, and acclimating them to their local climate.
If you live in the US Northeast, consider becoming a member!