  From both a theoretical and an experimental point of view, Bose-Einstein
condensates are good candidates for studying gravitational analogues of black
holes and black-hole lasers. In particular, a recent experiment has shown that
a black-hole laser configuration can be created in the laboratory. However, the
most considered theoretical models for analog black-hole lasers are quite
difficult to implement experimentally. In order to fill this gap, we devote
this work to present more realistic models for black-hole lasers. For that
purpose, we first prove that, by symmetrically extending every black-hole
configuration, one can obtain a black-hole laser configuration with an
arbitrarily large supersonic region. Based on this result, we propose the use
of an attractive square well and a double delta-barrier, which can be
implemented using standard experimental tools, for studying black-hole lasers.
We also compute the different stationary states of these setups, identifying
the true ground state of the system and discussing the relation between the
obtained solutions and the appearance of dynamical instabilities.
