From official project page : https://seedsigner.com
Single-piece enclosure design optimized for quick, permanent assembly with easy MicroSD card access; the camera and Pi Zero board snap into place with no other screws, nuts, buttons or other pieces required.
USPS First Class shipping included in price.
Shipping to Australia or New Zealand via FedEx costs extra.
Github : https://github.com/SeedSigner/seedsigner