Talk to Valeron in Bedel.
That being said, it actually makes for a good suggestion. Adding purified ones in HM mission roulette could be a good thing, just like we now have shiny solarion.
Yeah this is good, no point in having Rune upgrades have RNG when Armonia has a no-risk way of crafting materials for it (Expert chips to Armonia tokens) I'm all for this suggestion.