Try searching on #superlonghair, #verylonghair, and #longhair. Lot's of junk, but some good stuff.

Thanks to the OP. I must admit I was hoping that a few of them, the girl in turquoise (255) and girl in pink (272), were pre-cut photos as both have gorgeous hair but posed in a way suggesting a change coming. Couldn't find 255 but found 272, and she's still growing.