There are other alternatives, just not good ones.
Other than Alclad, there isn't a paint out there that replicates chrome, and if you are talking chrome molding, just imagine masking off all of that molding to spray down a gloss black and then the Alclad Chrome.
Aluminum duct foil....yeah that will work, but it is much thicker than BMF, and doesn't conform to a compound surface as well.
Really, a sheet of BMF should last you at least 4-6 cars (if not more) depending on how much chrome is needed on them.