I took a gamble and bought this: https://www.amazon.com/gp/product/B06Y3ZTJ98/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

The dimensions seem to be right for the Pocketgo but not sure it would be practical to keep in my pocket. At the very least it would provide protection while in a larger bag for travel purposes I guess.