Those mats drop in Delta (excuse me, "GV") but I've noticed hardly anyone picks them up. I do, but I pick up all drops out of habit.
Here's an interesting question: Why? Why would you want weapons/armor that's inferior in every way to our custom gear? Because it's fun to make? If he adds it to the god's giving, it won't be. Because it looks cool? That's debatable, and kind of a silly reason to add something.
it sounds more like your hoping for an even easier way to get 140/145 gear out of this not just the joy of crafting. there is no point to modify the gear. it is was it is. sure agatio could go through and alter the lvl and stats of every piece of gear on the server and waste of a lot of time in the process. but why should he? there is nothing wrong with the sets that are in place. now im sorry farming mats for up to 140 anyone can go and do. some maybe take longer than others but its doable. im all for haven these mats in an npc but only to see what i may or may not be able to craft with some luck, and yes decomp the things into chi stones.
I've seen some of those mats in some OHT maps while farming Chrono Leaf or Chrono Sand.