Hi Can anyone provide a source for the blackout material used in curtains. I already have a pair of curtains that will look good but they are no good for light blocking at present. I have roped..... I mean pursuaded my mother in law to sow the material onto the back of the cutains. I'm obviously looking for a good price and only need enough to cover a pair at 1500mm wide x 2000mm each drop. Any help appreciated.