Skip the paid collections and hit the actual forums. Quake, Doom, all those old games have fan sites with links that are totally free, plus the modders usually post their own fixes for missing files. I've been burned twice with these "ultimate" packs, and every time the free stuff was better organized. Check the file dates too, if they're all from one year, it's probably a dump job. Real paid mods that are worth money are rare, but when they're good, they usually come from a known creator with a Patreon or itch.io page. Your best bet is to ask around on a Discord for the specific game, someone will point you to the real stuff.

Honestly, how many times have you actually used live data to fix something, or is it just fun to watch numbers move on a screen? I'll take a solid code and a good smoke test over a fancy graph any day, but that's just me.