Here are some suppliers and sources of undyed yarns and spinning fibres
Dyeing Large Amounts of Fibre » School of SweetGeorgia
School of SweetGeorgia Learn to Weave, Spin, Knit, and Dye
New School of SweetGeorgia Classes!
Spinning Courses, Learn to Spin Yarn Online
Meet the Maker – Sionnach Yarns - Baaad Anna's Yarn Store
Spinning Luxury Fibres: Camelids » School of SweetGeorgia
A C Wood (Speciality Fibres) Ltd
SweetGeorgia Yarns Hand-Dyed Knitting & Weaving Yarn and
crossbreed wool – Wool n' Spinning
Spinning Courses, Learn to Spin Yarn Online
SweetGeorgia Yarns Hand-Dyed Knitting & Weaving Yarn and
Sweetgeorgia Yarn - Canada
Specialists in natural fibres, Wholesale Undyed Yarn
Feli by Illimani Yarns, Merino & Cashmere
SOS Dyeing Intentional Colour Workbook v1.2