These people, (link below) may be able to help with a peice of bespoke artwork?
http://www.clavework-graphics.co.uk/air ... y_001.html
Was the aircraft type recorded from National Archives report? Reason why I ask is I've found anomalies in their records before. Such as another KG6 aircraft also being recorded as being an "A14" type, when in fact it was "S0" prototype schnellbomber!
Look forward to seeing the book when it's finished, it sounds good!