Have you looked at Select Seeds?

“I remember a site years ago where there were many lovely types available, but it's been years and I don't remember the name, or know if it's even still up and running.”

Probably Flowers by the Sea: they closed for sales last year, but I believe they’re still involved in breeding and hybridizing and they maintain the website for archival/reference purposes: https://www.fbts.com/

Soonerplantfarm has quite a few. It's online but they're located in NE Oklahoma south of Tahlequah and I think they offer a discount if you pick up your order there. Maybe that's not too far for you. I've never ordered from them. I'm in southwest Missouri and tempted. Kinda pricey but it looks like the plants are large (gallon size and larger) so that's good.

https://www.soonerplantfarm.com/Plant-Keywords/salvia

Thank you! Flowers by the Sea may very well have been it. I seem to be missing out on many great nurseries, planning to order from them "someday," and then when I'm finally ready I find the nursery closed down the previous year. Lol. Happened with Joy Creek and a couple of others.