Don't know the cost.
There is a whole market at gharibabad behind the furniture market, also tariq road and shershah. One of the main dealers in gharibabad is imran mannan I am giving you his number 0321-8221732, 0347-2000300. He can tell you the price over phone, but do visit all these markets before making any decision. And if you are converting from a carburetor to EFI then wiring is the main issue, so please find an expert or you will regret what you did.
If you want good mechanics and wiring people who are expert at their work I am also forwarding their number
Vicky near disco bakery 03002761044, mechanic and electrician.
Workshop Name: Torque engineering.
Workshop City: Karachi
Workshop Address:163 bahadurabad block 3 street 24. Karachi
Specialty: Mechanical work
Owner Name: Mushir khan
Email: mushirahm3dkhan67@gmail
Phone: 03212435225
Please do consult both of them before making a swap.