SP has long stated that they will not put DS caps with clear legends into production. They have their reasons and consistency is one of them.
Deck is not really doubleshot, not in the same sense as any other DS keycap. The skirt is one piece of plastic and the legend/touch surface and stem are another. The legend is negative dyesub'd onto this piece.
There is a thread with pics of supposedly real PBT DS backlit caps, and there is another thread with someone claiming that this is what Deck is going to come out with soon. Would love for this, but I'll believe it when I have them in my hands.