There are now enamel badges for sale on http://www.coveredendchoir.co.uk/badges/
A bit of background about how these came about. @stonemuse
collects metallic Charlton badges and had the idea to create one to complement the protest shirt. He has personally paid for 250 badges to be made, which are to be sold for £4 each inclusive of postage, and with all proceeds going to the Protest Fund. A great gesture by him and many thanks.