You can buy in-dash 7" lcd monitor from Rs. 7000 to Rs. 20,000 and a rear view camera from Sajid Radio Mall road Lahore. Please go for CCD camera as its picture is crisp and clear. They also have CCD rear view camera with night vision. Please keep in mind that CCD cameras are costly than Cmos cameras.
Contact info:
Mr. Rizwan or Mr. Nasrullah
0427221475
03004246003