I hope your project takes off. I’ve been waiting for years for an ADhoc publications in their From the Cockpit series, but I fear they are not around anymore.
You could try the chap who runs this informative site on ejections for contacts : http://www.ejection-history.org.uk/Aircraft_by_Type/Gloster_Javelin.htm . The Javelin was such an interesting aircraft in so many ways and so distinctive from every angle.