I dont know about any shop in Karachi. But I know 1 from Lahore, I got notes from them of geography of officers academy and public admin of toppers acedemy. Here is complete address:

Tahir Iqbal Photocopy Store
Owner: Rana Ashraf
0321-4734258
0345-4734258

Address: 1st shop shopping center STC Punjab University Lahore near boys hostel.

You can first ask him about your required notes and of which academy he has. You just order him on phone. He will send you notes through VPP of Pakistan post to your address. You will pay at you door step once you recieve the VPP parcel.

If someone knows such shop in Khi he can tell you otherwise you can order the notes from Rana Ashraf and get your notes in 3-4 working days.

1 tip that the notes of officers academy are much much better and comprehensive than that of other academies.
Regards