Since this is a legacy patch, you won't find it on official modern launchers like Steam or GOG (which come pre-patched to 1.0006). You can find it on:
Back then, patches were region-locked. You need the specific WorldWide , US , or CIS/Digital version of the patch to match your game disk/install. Since this is a legacy patch, you won't
A tiny handful of "ancient" mods from 2007 only work on this version. Since this is a legacy patch
or AP-PRO.ru: The biggest community hubs for S.T.A.L.K.E.R. Since this is a legacy patch, you won't