Mbugua, 

This is not rather obvious for the present situation. As you may be aware, Samsung stopped selling PCs in many markets and Africa is one of them, Even Europe had seen a halt. With this I doubt retailers would see keen to stock accessories of a product they are no longer selling.  It's been more than a year now.

I suggest you shop from a market like US and have it shopped for you. Amazon would be a good place to start.

Gicheru Martin