Hi, I am not sure if other countries have them, but instead of a double boiler I use a large saucepan sitting inside an electric frypan with water, when teh curds ahd formed I transferred them into a large stoneware bowl then placed teh bowl back into teh electruc frypan, to assist in keeping everything hot. I have had comments from overseas visitors who say they have never seen electric frypans, they are common in australia and new zealand.