As I understand the process, the S parts were supplied to Portbury docks to be built into fairly basic Breras imported for conversion - hence no Skyview.
As there was low demand for the S, I reckon they are cutting their losses and breaking up the S kits, resulting in a series of hybrid "special" models. I don't think they have converted anything like 500 S's, but could be wrong of course, knowing Alfa's record for miscounting specials.
Anyone got any idea how many S's have been registered? Who's got a recent "Limited Edition" certificate?