Hallo Steven,

You can buy chemicals by postorder here:

http://www.hekserij.nl/
(Last time I checked they had the ingredients for cyanotype)

and

http://www.labstuff.nl/

I never ordered at the sites. Because I could get the chemical I needed (KBr, potassium bromide) in at Drogisterij de Spaanse Vlieg in Groningen. (saves shipping, I work in Groningen):
http://www.despaansevlieg.nl/

Regards,

Jan Alwin de Jong