I have been looking for some A. parviflora and A. obovata for awhile, let me know if you find a good seed source. There are etsy options but not sure on the viability of seeds from a lot of the sellers there.
If you're purchasing these species to establish a food forest however, I would not recommend any of those you listed. Mainly because they do not produce sizeable fruits, and the production time is years out compared to a grafted tree. My suggestion would be to invest in 2-3+ grafted Susquehanna Pawpaw trees (A. triloba). A. triloba is technically native to the northern part of the state, as D-Grower mentioned, but the Susquehanna cultivar is popular in the Southeast for its heat/sun tolerance compared to other American pawpaw cultivars; it should do just fine in Zone 9. I currently have one in Zone 10 hoping to see how it does.
The other species are great for pollinators though and would be a more beneficial garden addition in that way.
Best of luck.