I saw it from the dolmus, it's on BMB just to the right of China Palace. It's a small shop but she sells most of what you might need in the way of tools, screws nuts and bolts etc. If they don't have it in the shop she will send a lad off on a scooter to fetch it from her store room, oh and she speaks perfect English.
She tells me that if anyone needs anything in the DIY trade they can contact her either from UK or Turkey, she will order it and you can collect it from the shop. I wish I had known about this before I went to the trouble and expense of shipping over some non-slip flooring for my bathroom.
She's running a small independant shop trying to make a go of it so maybe give her a try.