I bought them from Amazon but I've just looked and they aren't selling them anymore, Paul Pearce has used crayola, all you need is a hair drier (no offence Derek) and a comb(again no offence Derek), heat the fibres or crayon and colour away then comb into fibres then colour again from a different angle as you only get the colour on one side of the fibre, the combing stops it from getting 'gloopy' (that's a technical phrase)
Shaun