It was done earlier in the Jewellery shops in Shara Kaharba and now all those shops are closed. It will be better to go to any of the Jewellery shops in the souq. Kinara Jewellery was doing it earlier and now they are located in Frij bin Dirham near Al Meera of Mansoora. As you are a Pakistani by profile you should know Khutba Restaurant. It is near to it.