Dear malikiqbal,
Since I have been operating in Isl/Rwp market a lot for my workshop so I may help you out.
I am in Lahore these days and I guess the only place to find the carburetor in pindi is Mithu Khan Ahatta, if you fail to get it from there just drop me an email or cal me and I'll arrange for you from here in Lahore.
Regards,
333-5958148
corruptgangster@gmail.com