Mexican gold: In Progresso Nuevo, Mexico near Brownsville,Texas. Prices:composites $30,gold onlays about 120$,gold crowns about 150$. The best gold to get is palladium free but that may be hard to come by there. On the other hand what they use there may not have any in it at all since Palladium costs about 1/2 the price of gold and if you are making a cheap product you might just leave it out.