Continental has installed some blue mesh curtains in its domestic fleet. They are not the same as the the old curtains, but they do a pretty good job of blocking traffic flow between the cabins. They aren't really that transparent, but they still allow minimal visibility into what is happening on the other side of the curtain.
You will see it if you enlarge this picture.
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Photo © Je89 W.
If you have never designed an airplane part before, let the real designers do the work!