Late to the post but, see if you have a local wildones.org chapter. One of the ones near me has a great website where you can buy seeds and plants in spring and fall. I did also redo the wiki last month so you may be able to find resources in the resources by state area. If you find any good ones for your area PLEASE let me know, I love adding new ones.
Edit to add, the wiki link goes to the slrpnk.net wiki on lemmy NOT reddit. I know a lot of people don't want to go to reddit so I want to clarify.