In POP there are 2 beauty supply stores that I have found. I was so excited to see them because sometimes I am a do it my-selfer too. Anyway there is a smaller one on Separacion across from the Karate school near 12 de Julio. Looks very modern but seems a tad smaller than the other one which is on Dr. Zafra Road. I have actually been inside that one and I get it from traveling on Beller and then turning right on Dr. Zafra. Unfortunately I am drawing a blank on the names but that is exactly where they are and on the signs underneath their names it says in English Beauty Supply so you can't miss it.