i actually don't really know sorry and i'm not sure if there's a specific mine producing lavender labs, or it's found with any labradorites just in smaller quantities, or what. hm. i'll ask next time i talk to my lapidary friends.
if you look up "spectrolite" though, that's basically super fancy labradorite out of finland, it can get really bright colors and be very pretty
[link] this is the guy i bought this stone from (this is a different one, looks like it's not quite as nice but does still have some lavender) keep an eye on this guy's shop or maybe you could even write him and see if he can find one for you it's always so hard buying labs online though, so hard to see the real flash =/