As a follow-up, the outlet on the ground floor of the shopping centre with Lulu, i.e. the one near to MoE, is called '
Dar Optics'.
They do indeed stock Serengeti's, however the same provisos - as listed above - apply here too, i.e. a complete lack of models with drivers gradient.
Nb. Typical prices (
at all outlets visited) was in the region of 1200 ~ 1500 Dhs (
prior to negotiating any discount).
OKC