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Adafruit LCD Shield Faceplate
by chowderhead, published
For the oh-so-nice https://www.adafruit.com/products/772
This is intended to be incorporated in a case design, but the Customizer paradigm forces a little smarter coding, so here it is as a Customizer version. Easy enough to use as a library item.
I found this nice thing after I was almost done, might also suit your purposes: http://www.thingiverse.com/thing:33567
I think buttons print better when put on a raft, hence the three rendering options.
Use small wood or sheet metal screws into the standoffs to secure the board to the faceplate.