Good evening, everyone! I registered for this forum solely that I may contribute, as I saw a number of members requesting a flat pattern. Just in time for Halloween, I sought to make a pair of this fashionable eyewear for my own Doc Brown costume. A coworker's friend was kind enough to construct a pair according to a pattern I created last night.
"I apologize for the crudity of this model; I didn't have time to build it to scale or to paint it."
I admittedly don't know anything about construction materials, so you might have a better metal with which to work. Nevertheless, I'm pleased with this costume prop, and I offer my pattern to anyone whom it may benefit. Just print it at 300dpi; it's 16"x2.5". I'll also post it in two halves which can be printed on a single sheet and assembled.