Here’s a list of resources for wearable electronics/ etextiles resources.
US-based:
SparkFun: eTextiles products https://www.sparkfun.com/categories/204
Adafruit: Wearables products http://www.adafruit.com/category/65
Europe-based:
Plug and Wear (Italy): http://www.plugandwear.com
Info:
Description and photos of materials, with some purchasing links http://www.kobakant.at/DIY/?cat=24