Preview is limited to 2K body and 1K hands. It is here to help you decide whether you need these textures in the first place or not, and is available for everyone. For the same reason it has all body replacers support.
Link: https://sharemods.com/9vshobuczbpu/ALT1_Skintones_preview.7z.html
9$ patrons can request an uncut (full) version of this as their monthly reward (for a desired body mesh, same as original ALT1!) with no additional fee, and 20$ get access to all supported bodies in full resolution as a post (they can still request 2 more texture sets and a commission)