http://www.trekitt.co.uk/ seems to be the cheapest for the hooded version, for the regular you can find the baby blue and vermillion regular versions cheaper than the black though.
No, thank you for giving me the opportunity to satisfy your material needs, extraneous as they may or may not be on a level of existential necessity-it is my sincerest and most gracious pleasure.
http://www.trekitt.co.uk/ seems to be the cheapest for the hooded version, for the regular you can find the baby blue and vermillion regular versions cheaper than the black though.