To help you find the exact post, could you provide a bit more context?
(e.g., a specific game, a collection of photos, software, or a 3D model pack).
Commonly, missing parts for these types of "Packs" are found on sites like , Reddit , or various Discord servers . If you have the link to Part 13 or the main page, I can try to help you trace the rest.
(e.g., a creator's name, a version number, or a specific date).