Perennial Tepary Beans: Where to find them?

I've read of perennial tepary beans:

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0234611 (see table at the bottom of the page "S1 Table" - search in the spreadsheet for "tepary")
https://www.gbif.org/species/5350515
https://repository.arizona.edu/bitstream/handle/10150/552188/dp_05_02-067-071.pdf?sequence=1


I've come across several Latin names:

Phaseolus ritensis
P. metcalfe
P. maculatus


I've come across various common names:

Frijole de Monte
Santa Rita Mountain Bean
Perennial tepary bean
Metcalfe bean


My understanding is that the Ritensis and the Metcalfei are different species of tepary that are both perennial.

...

Does anyone know where to get seed to propagate one or both of these perennial tepary beans? Purchase or seed exchange?

Thanks! : )

This thread offers some suggestions on where to get tepary beans;

https://permies.com/t/92837/Tepary-Beans

Also, Joseph Lofthouse grows them though I don't know if he has any to sell.

To anyone in a semi-arid or arid climate interested:

I got a hold of some P. maculatus and P. ritensis. They are perennial dryland beans. If you will save some seed and share it with me, I will send them to you.

I found more information on these beans if anyone is interested:

https://archive.org/details/p-maculatus-metcalfei-and-p-ritensis-1980-nabhan-berry-and-weber-economic-botany_202207

I communicated with a tepary expert with the USDA, and he said that these perennial beans are not "true tepary," though I'm not sure what that means. In the linked document, they say that some of the common folk names include "tepary" in them, among other names like "cocolmeca" and "frijolillos"