I want to avoid more mods for now, maybe I'll look on GC later.
I thought I had read on changelogs that Gregtech asteroids were back, but was only a Spwnx suggestion;
Well, I'll try a aqua Pickaxe for the fortune 3. If that wouldn't be enough, I'll just reset the End...
Feels like cheating, but I'll remove common ores from generating there before that. Feels so much more wrong finding a Tin/Nickel vein there...
Thanks for the info, guys.