Got it for 1,200 from Muslim Town, Lahore. It is available on Pakwheels online store as well.
https://www.pakwheels.com/accessories-spare-parts/liqui-moly-radiator-cleaner-300-ml-2820049
Total coolant used was 1x4L can, 2x1L bottle, plus another one liter bottle approximately used 1/3. Total 6.3 liters including reservoir, kept the reservoir a bit higher than the max mark.
I want to mention one more thing that my radiator cap had it's seal damaged and I realized it when I checked the coolant after a couple of days. However I only needed to add approximately 150ml in the reservoir.