You will find in Al Nada Trading Co. at Al Khalij Street. if you drive from Al Mannai round about to Al Jeedah flyover in the middle on your write hand. you can call on 4437474 after 4:30pm the GM: Mr. Ali Hassan
Don't know the shop's name but it is between Doha Petrol stn and Qtel.
If you are drive from Doha Petrol Stn towards Qtel Signal the shop is on your right Just before the Mercedes Building.