I am looking for a tigelliera made of cast iron, the type to be used on a stovetop, not electric. Most of what I've found online are aluminum and the rest will not ship to the US. Aluminum ones just don't work nearly as well because they don't hold the heat as long. Can anyone suggest where I might find one? Here's an example of what I'm talking about: http://www.enricopruni.it/en_GB/mold-tigelle-7-seats.php Thanks!