VideoCardz has leaked retail packaging for several Intel Alder Lake-S processors. Intel Core i9-12900K samples are available to purchase online though, albeit for upwards of US$700.
https://www.notebookcheck.net/Intel-Alder-Lake-S-packaging-leaks-but-Core-i9-12900K-samples-are-already-selling-in-China.567750.0.html