If you have a Sporting Goods Store that sells dog items, they might have them in stock to check them out in person. I saw them at Scheels - but my quick Internet search showed that REI, Bass Pro Shop, and other nation-wide sporting goods stores did not have any Canine Goggles available. There might be some sales/discount codes that you can utilize to bring the cost down.

There are also - Doggles - on the market. They come in a few different varities, as well as a much lower price point.
Doggles - Goggle Style
K9 Optix - Sunglass Style
Petco

Your local pet store might offer some - or they might be willing to order them for you, if you want to support a small business. Chewy did not have anything availble for Goggles. You can find them on Amazon.

My absolute curiosity-killed-the-cat nature wants to know what you're using the Goggles for - especially as you want to use them at night