I've never found anything commercial that I would describe as a "good quality" woman's business suit here. They're also not common so the vast majority of the suits I've seen here tend to be more cutesy and social. (ie, no ruffles on a business suit please

)
Zara quality is a joke - they're known everywhere but here as a place to buy disposable clothes you wear for a season and they fall apart. Cheap prices = cheap quality (although here, not cheap prices but still bad quality which baffles me).
Anyway, rant aside, if you can find a good seamstress, it might be worth looking into getting something custom made. Otherwise, stock up when you travel if possible.