Anyone with Beach Plums who have seeds / suckers / cuttings?

I've been looking to grab some Beach Plums for my Garden in Eastern MA, but it seems a lot of the good varieties are hard to obtain anymore.
I'd love to have a Nana or Eco variety, but it looks like sadly Okios closed up shop last year.
The only plants I can find online are un-named wild varieties with no guarantee of good quality fruit, or productivity.

Does anyone have any Beach Plum seeds from an Okios plant, or even better, suckers/root cuttings?
I'd be interested in other varieties as well as long as they are productive fruiters.

I'd be willing to pay a good amount for the hassle, and I'd really appreciate it.

I am on the other coast, so not familiar with those. I do have an heirloom variety called green gage which is still green color when ripe but very sweet.