Try "Gul Traders" near Naz cinema chowk, Murree road Rawalpindi. They used to sell Value company, a Chinese brand, vacuum pumps.
web: www.worldvalue.cn (change language to english)
Try to get the dual stage pump and at least 3 to 4 cfm model.
You will need to buy a line set (3x 1.5m) and a manifold gauge as well with the dial gauge indicating all your required refrigerants like R134a, R410 (and R22 if you have an older ac at your home ) or you can buy a digital gauge that is expensive but very handy to use.
For the car ac you also need quick release couplers. Finally, you need to check the end connectors of line set so that they properly mate with manifold gauge set, cylinder valve and also with R134a couplers or you have to buy few adapters as well.
Add your required refrigerant cylinders to the list as well if you haven't bought them already. Those little disposable containers labelled with some renowned refrigerant brands are mostly fake.