i dunno if you can find it, I'd imagine you can. Just ask around in smoke shops and places where you'd buy bongs or pipes.
Here's everything you need to know about Salvia, and btw, its definitely not something to be taken lightly...

http://www.erowid.org/plants/salvia/salvia_basics.shtml
OniEhtRedrum781 Reviewed by OniEhtRedrum781 on . Salvia, First Time I tried 10x Salvia for the first time today, and it was horrible. My gf and my brother videotaped the experience and I don't remember I thing I did. I was tripping the fuck out. I also had the worst fuckin' introspective nightmare, that i now can't remember, and wouldn't stop babbling about "The Island", whatever that is. On top of that, it left me with a really dirty feeling for another 20 mins after coming back. It was an okay experience, but I don't think I'll ever do it again... Rating: 5