Amazon : Listings for the "Official Google Cardboard" often appear from third-party resellers.
Known for high-quality, durable versions of the V2 design. 🛠️ Build Your Own (Free) google cardboard official buy
eBay : Often has original Google-branded units or multi-packs (e.g., ~$45 for a 2-pack). Amazon : Listings for the "Official Google Cardboard"
One of the original primary partners still producing Cardboard-compatible viewers. google cardboard official buy
While you cannot buy it from Google, several "Works with Google Cardboard" certified partners and retailers still offer the viewers: