Felt, I think you have to go to Once. And possibly you could find the fancy hole punches there as well.
Scrapbooking, which is the big market in the USA for fancy hole punches and scissors, is not an Argentine thing. So scrapbooking supplies are kind of thin on the ground here.
There is a graphic design neighborhood of sorts over near Cordoba and Gallo or Bustamente, behind the hospital de ninos and you might be able to find spray glue and transfer paper over there- there is a whole cluster of high end copy places, graphic supply stores, and the like.
Stationary, of course, in the typical argentine fashion, is completely different, and would be sold in different stores in different neighborhoods.
Once, again, probably would be a good place to look- for instance, just online here is one-
http://www.papelar.com.ar/index.php
its at Larrea 723, and often, especially in Once, places like these are in groups, on a street or neighborhood, so going to this one would probably put you in close proximity to several more.