Thanks to all the suggestions. I think I picked up my last can of dulce de leche from a Latin American grocery in Somerville, but it was pretty far from my house. I'm afraid to boil a can myself because I may forget to check the water level. Is the home-made dulce de leche just as good as the commercial one? Cajeta would be perfect actually, I like the slight tang from the goat's milk.
@Dulce de leche...I love your handle.