Ortopedia Ultra - Aguero 1219 - I just had my daughter's insoles done there. I've heard that quality insoles are difficult to find, that Ortopedia Alemana which used to be the best is not so good anymore, blah blah, and that apparently Ultra is one of the best places. We'll see. At least the guy who measures your footprint (i am thinking in Spanish here, no idea how to say it properly) seems to be dedicated.
Good luck.