There was a maroon 280Z with original engine and auto transmission, with sunroof at a car dealer near Askari 4, Karachi till the mid of last year. I moved to Islamabad after that. it may still be there. Personally, i like the 240 better 
I think there's a yellow, T-top version somewhere in Clifton also. Saw it a couple of times. location - if you drive towards the port a little from the new Dolmen Mall. it was parked infront of an appartment complex. Good luck!