boss,
it is impossible to get new "dashboard" parts of lancer in karachi. Go to shershah simple. find the guy named Fahim whose shop is beside "Saeed Bhai-famous for old honda & accord parts". this Faheem guy has dashboards of charade, corrolla 80-88 and other cars and i bet he can source one or let you know.
Another option is frequent visit of shershah, there are many cars which are butchered on daily basis maybe u find luck and u might get a donor car for parts .