I have recently started working on a MOC again, the same one I was building last year. And I was thrilled to see a new part/color combo for 2012, the dark tan slope 75 2 x 1 x 3.
It’s only available in one set, and that set only includes two of this piece, it’s the Ninjago Venomari Shrine #9440:
I managed to get a hold of 80 of these pieces via BrickLink (see photo above), which is great since the set is still so new. Stay tuned for the fate of these pieces!