You could buy Sasha Dolls at Tridias in South Kensington, which was a great toyshop of the 1960s/70s. I believe the last reincarnation of the business has recently been taken over/closed down. When we were researching for the Mini Me exhibition I became interested in Paul & Marjorie Abbatt's Toyshop, designed by Erno Goldfinger in 1936, situated in Wimpole Street, W1.
They made educational toys and the shop looks like a modernists dream. Goldfinger's house in Hampstead, 2 Willow Road is open to the public and is currently showing an exhibition of his toys that he made for his children and the Abbatts. I found out about the show from shelf appeal, "a blog about things, anything you can put on a shelf" which appeals to the shopkeeper in me.....and the Shopelves.