you can get from Sultan da khoo (Rawalpindi), and for Lahore you can easily get it from your market (i forgot the name of place where old japanese parts are available)
Dont know about the price, as you have to bargain with those ppl, they have their own prices.
Infact the price is not for the parts, but they cash your requirement. If you are in need, and the part is rare, it will cost you a lot, if part is not rare, then it will be relatively cheaper.