Hi Kassia! Welcome to NGA.
I bet you could find a LOT of those in seed swaps, especially since many in your list don't list "just one rare cultivar".
The nice thing about swaps is that you can browse many people's offerings and select only and exactly those that you want.
Then you pay postage just twice, but send and receive up to hundreds of packets.
Great deal!
It's difficult to find more than one or two things to swap with any one person. Then it's paying the same amount of postage as swaps cost, to trade with just one person.
I love our seed swaps!
Tools & Apps | Seed Swaps
or
https://garden.org/apps/swap/
