khyber and margalla not sold in abundance? - I think you were either a child at that time or not paying attention, every 3rd car on any road in Pakistan in their heyday was either a khyber or margalla, literally were like mosquitoes and flies.
In the late 90s khyber was hot item to steal in khi as it was pretty decently quick for its time, and if you showed up to police station for report - every other stolen car was a white khyber - good luck detecting it.
margalla was hot item for mqm era attacks, it was very quick for its size, turned very nicely and seated 4 with weapons in the trunk, all of the stolen ones were white too. Good luck finding it, its like trying to find a "red" cd70 - yeah good luck 