As Sakaera say, their website now lists their address as Barwa Commercial Avenue:
Barwa Commercial Avenue, Al Safwa Building,
Block 4, Showroom SFS010
Tel: +974-4005 4448
Fax: +974-4005 4449
Email: [email protected]
Website: www.kitchencoqatar.com

Also, Kitchenco is the same family of companies as Table Arts, with shops in City Center and Lagoona Mall. They also might stock the whipped cream bulbs.