Looks like the official online shop has launched some new mascot pins today. A quick look through the site reveals the following

Two individual mascots in Union Flag colours (soft enamel) - £6.50 each
A pair of Union Flag mascots (printed) - £7.50 the pair
A boxed set of Union Flag mascots (soft enamel) - larger than those above - £20 boxed
A boxed set of police mascots (soft enamel) - same size as the boxed Union Flag mascots - £20 boxed



I understand that the London 2012 shops have exclusivity on the Union Flag and police boxed sets for one month. I'm not sure about the pins on card.

At the time of writing, all but the individual Union Flag pins are marked as 'out of stock'