I was surprised that you haven't yet received a response, Ellix, so I did a search. There have been seed exchanges for Yvonne's salvia on GW, but it looks like it might be too late in the year to obtain seeds now. They were a hot item! There is also info on the history.

Lorna

Lorna, I am surprised as well. I did do a search and contacted a few people. One has some. I know it is late in the year but I am going to try them anyway. I will plant some in pots as well and bring them in in the winter so they will get a good heard start next year.

Sorry
I thought someone would have come up with the Idea of
taking cuttings so you get a clone of that plant as seed
can be different from the parent.Maybe someone should suggest that to Yvonne so she is not waiting on seed
and can reduce the backlog of people wanting her plant.

Yvonne is quite elderly and she is not the one distributing the seeds. See the link below to get the story.

Here is a link that might be useful: Yvonne's salvia story