The single came in a white label promo version and a stock version with Sire labels. Both have titles in spanish and was issued in company sleeves.
Today, 32 years later, it looks like the promo version is easier to find than the stock version – but often with the handwritten XX on the labels.
Here they are, the only official singles from South America:
Songs: No Te Vayas (Don't Go)/Ven Ahora (Come On Now)