Shop Blinds For My Balcony

Hi,

anyone know where I can buy those large vertical blinds that are used outside shops all over Thailand.

I don't mean the awnings that jut out - just vertical hanging ones - preferably roller ones that spring up. They are usually made of plastic but canvass ones preferred. I need some for my large balcony. Alternatively good bamboo/lined ones would do but need to be wide and not roll-ups, although Roman ones (raise and lower in 'layers') would do.