We study the electronic spectrum for doped electronic states in the or
ientationallY disordered M3C60 fullerides. Momentum-resolved Green's f
unctions are calculated within a cluster-Bethe-lattice model and compa
red with results from calculations on periodically repeated supercells
containing quenched orientational disorder. Despite the relatively st
rong scattering from orientational fluctuations, the electronic states
near the Fermi energy are well described by propagating states charac
terized by an effective Bloch wave vector and a mean free path l almos
t-equal-to 20 angstrom. The effective Fermi surface is calculated in t
his model. This differs from that previously calculated for the orient
ationally ordered crystal, but is relatively well described within a d
isorder-averaged virtual-crystal Hamiltonian, which we derive.