You can download the xml files from this link: https://raspberryshake.net/stationview/
RS StationView - raspberryshake.net
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Once the station map is open, click on one of them and you will see a drop-down window on the left of the screen (see the figure below).
In the Downloads option you can obtain the xml file for that station (Download instrument response).
Ing. Esp. Ricardo G. Sifón
Departamento Laboratorio Sismológico
Instituto Nacional de Prevención Sísmica
Roger Balet 47 Norte - CP 5400 San Juan
Tel. +54 (264) 4239010 int. 211