  In this paper we compute, within in the context of a relativistic quark
model, the Isgur-Wise functions for exclusive semileptonic $\bar B \to X_c$
decays, where $X_c$ is any charmed mesons with total spin $J=0,1,2$ or one of
their first excited states. The relevant matrix elements are computed by a
direct numerical integration, in coordinate space, of the convolution of the
wave function of the $B$ meson at rest and the wave function of the $X_c$
meson, boosted according with its recoil factor. Our results are compared with
other predictions found in the existing literature.
