The only plant in town that sells propane and not butane according to the gas adapter shop salesmen. Though you’d probably be fine with butane (see other gps listing above). You’ll need the adapter here. Also note that butane is often referred to as propano throughout Latin America.
Place: Sergio Gas (Fill Bottles)
Visited: January 3rd, 2011
Location: -24.77140, -65.41067