Dear Mr Ejaz,
Please share the information you got from Mr Mohsin; as i am also looking for one. Tried looking around in Rawalpindi on the City Saddar Road but everything they had was like extremely old and much less in terms of power.
Few days back was in Shoba (Peshawar) for something and asked a few people about possible availability of winches; but they had no clue about what i was asking for. Someone from that area might have good idea of people selling good winches as its hard to believe that place like shoba bazar will not have anyone selling these.