Dutch Groceries in London

Hi all,

I was wondering if someone could point me to someplace in London where I can pick up a few Dutch provisions.....things like Calvé Pindakaas and De Ruijter Muisjes Gestampt.

I'm not really looking for a webshop as I use two very good webshops already....I'm just looking for somewhere in London where I can pick up a jar of Pindakaas or a box of sprinkles when I run out of them, and before the next load comes from Rotterdam!

Many thanks in advance!
Shant