A less expensive version of MYA's original brass stem QT, cage hookah is the 1863 Econo-QT. The 1863 Line of hookahs, which belong to the same family, have a black aluminum cage and an aluminum stem.
An alternate, more reasonably priced line of hookahs made to suit your needs in terms of price and material preferences is the Mya 1863 range. With the right maintenance, Mya's premium aluminum can last just as long as a brass stem.