Beckford Silk has silk dupion in 'natural white' for £11.53 a metre and duchess satin for £28.75. I've ordered samples of each, but suspect the white might not be white enough.
Cheap Fabrics has silk dupion for £11.79
Hansson Silk has silk dupion for £15.99, but has limited stock of pure white. They also have duchess satin for around £50, way out of budget!
For future reference, the fabric shops on woodland lane in Slough has a small selection of colours (including ivory but not white) in silk dupion for £9 a meter.
Cheap Fabrics has silk dupion for £11.79
Hansson Silk has silk dupion for £15.99, but has limited stock of pure white. They also have duchess satin for around £50, way out of budget!
For future reference, the fabric shops on woodland lane in Slough has a small selection of colours (including ivory but not white) in silk dupion for £9 a meter.