Where are these mountains?

Does anyone have a better source of them? I'd really like to make them into proper tiles..or if someone else will do that for me, that would be super awesome. I'd rather not be improvising and cleaning up a JPEG thats covered by so much foreground.

...maybe I should just hound Nick to see if he has the beta diamondus lying around (though I doubt it but it doesnt hurt to try). I was intending to poke him about that auction anyway.

Finally someone noticed it!

Anyway, I think it's possible to create a facsimile of those mountains with Texture Maker, since they're basically an irregular zig-zag with a bump from the upper left (light) and distorted scratches.

Another thing missing in Diamondus Beta by Pyromanus is the vertical lake extension tile (Tiles 7, 71 and 7, 72 in Diamond Dust by BlurredD)