I believe I've seen that salvia for sale locally in San Antonio at a nursery in the past. I should check and see if they still have it. Mine disappeared during the worst year of the drought and heat when I developed health problems and failed to water the yard enough. Interesting history on that species. It's endemic to Texas and many thought it might be extinct in the wild in the 1980's, when Marshall Enquist found some growing wild during the time he was working on his book Wildflowers of the Texas Hill Country. Soon after that other isolated stands were found and a Hill Country nursery started propagating it for sale. From those, the native plant people started growing them and passed along the seeds to others. I wish I'd been able to meet Marshall Enquist, but he went on to become a lawyer after that book was done. Afterward, he seemed to lose interest in the wild plants he spent so much time documenting and photographing during his student days. His paperback book is still sold (although sometimes out of print), but sadly it's never been updated for changes in botanical names and has never been available in hardcover. For native plant people of the Hill Country, it's the book you absolutely have to have, but it falls apart easily.
