In case you didn't get a response from OP have a look at this:
http://www.ebay.co.uk/itm/Charge-Plug-Prestige-2012-Medium-/251491490906?pt=UK_Bikes_GL&hash=item3a8e0f9c5a
@highland_cow started
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In case you didn't get a response from OP have a look at this:
http://www.ebay.co.uk/itm/Charge-Plug-Prestige-2012-Medium-/251491490906?pt=UK_Bikes_GL&hash=item3a8e0f9c5a