Found it, but each serial key has in-between broken links for ad revenue, so no real access to the old serials. You can 100% find new websites that offer the past 2 options. Update : Using the wayback machine is not something I'm used to.
p8DRNQ. llz5a5of7e.pages.dev/397llz5a5of7e.pages.dev/101llz5a5of7e.pages.dev/114llz5a5of7e.pages.dev/230llz5a5of7e.pages.dev/272llz5a5of7e.pages.dev/398llz5a5of7e.pages.dev/123llz5a5of7e.pages.dev/131llz5a5of7e.pages.dev/397
cd key call of duty united offensive
