Caramel fudge pieces into sauce?
Fudge is a mixture of sugar, butter and milk/cream, made by slowly crystallising sugar at about 115C. You can make a caramel sauce by heating sugar and water to this temperature, and then adding cream (or maybe evaporated milk), followed by more gentle heating. So I think there is a chance it will work. You might want to add some extra cream for richness and texture.