Samialvi: It depends on the size of the projectors and the housing, I am quite certain you won't find them easily in Pakistan if at all.
TSX Projectors are great but they are single beam, so you will have to install reflectors(or even projectors) if you want high beam.
Retrofitting is not easy but it's not impossible either.There are loads of guides/tutorials that explain each and every step.
I am not aware of any retrofitters in Pakistan.
If you find the quad setup expensive, how about only a dual setup.
Also if you are in the states, check out The Retrofit Source online: headlight upgrades for all applications, these guys are THE best.