why dont u search in eastham,london as that part has lot of indian stores. for the oil look for shicacai or amla. I have heard that sikakai is best but I myself never used it.I use olive oil for my hair zit zitoun forever
Indian oil is good but it might be more suitable for Indian hair than for Moroccan hair. For my daughter I have found avocado oil and almond oil to be excellent. Argan oil is also very good but way too expensive in Paris.
Brick lane is the largest Asian neighbourhood in London. The closest tube station is Shoreditch and you find loads of specialised shops and mini super markets and on sundays there is a big market. Tooting is mainly for restaurants and food shops, i live close and i don't recall seeing shops for hair products. Hope this helps