Here are some suppliers and sources of undyed yarns and spinning fibres
Art of Yarn — LiveJournal
Yarn Australia, Knitting Crochet & Spinning
Art of Yarn — LiveJournal
SweetGeorgia Yarns Hand-Dyed Knitting & Weaving Yarn and
SweetGeorgia Yarns Hand-Dyed Knitting & Weaving Yarn and
Journal – Jan Atherton
Spinning Luxury Fibres: Camelids » School of SweetGeorgia
crossbreed wool – Wool n' Spinning
School of SweetGeorgia Kits & Projects - SweetGeorgia Yarns
A C Wood (Speciality Fibres) Limited
Spinning Courses, Learn to Spin Yarn Online
Spinning Courses, Learn to Spin Yarn Online
Dyeing Large Amounts of Fibre » School of SweetGeorgia