It appears that it is being sold with the case packaged as a NAV160. I have e-mailed a few suppliers and asked if you can buy a replacement case on its own.

Hi. I have just bought a XGPS and am interested in mounting options. I have seen several photos of the XGPS160 inside a waterproof looking case on what looks like a GoPro mount but I can not seem to find it for sale anywhere. Any suggestions? https://images-na.ssl-images-amazon.com/images/I/41ZtfJbs...