Hi Greencroft,
Get yourself to a Sony dealer and pick up a leaflet on their range. Make sure it has the technical information section too, which is normal a seperate section in off white paper. This will then list which models still come with LANC on them. Then figure out ones with AV in also and your choice is narrowed some what! The Mic socket is not LANC ( LANC is sometimes know as Control - L also On Canon camcorders this is know just as Remote Socket). Their are a few places around making remote controls for this purpose also check out
http://www.skytools.m.se/products_all.htm and look at the Cameye products.
Hope this helps !!