Alas, these are apparently a one-of-a-kind set at the moment, although I certainly hope it will inspire others to start making their own in the years ahead and making them as readily available as steampunk goggles on Etsy and elsewhere on the web.
This isn't to say that bamboo and leather/rubber are the only substances Lao goggles would be constructed from. Given the ornate designs that have been historically employed in Lao formal dress and architecture, it would probably reflect those design sensibilities as well.
One can only imagine what a steampunk version of the costumes from the Lao epic Phra Lak Phra Lam would look like:
But what are some of the things you think we would likely see in Lao steampunk attire?