Another useful link (from Ken Gordon) on medieval (Italian) dyes and woollens posted under 'Painting & Terrain' and subheading 'Painting traditional cloth designs on toy soldiers'
CarlL
hope this works! see http://forum.soa.org.uk/index.php?topic=6775.0
CarlL
The link works to take you to the topic but you can link to the message itself if you have it open.
The Company of the Staple link was also mentioned in a topic on British plant fabric colours (http://forum.soa.org.uk/index.php?topic=6305.0) (see message #19), which mentions various other sources.