[John Vasco]

Joe,
You will not find a AI1(k) report, since all four crew members were killed. 'k' reports were interrogation reports.
I think you are looking for the AI1(g) report, as the 'g' reports cover what is found in/on crashed enemy aircraft. However you need to bear in mind that the service was overwhelmed with all that came down on the previous day, and also that Brandenburg's aircraft came down on Whitstable beach. Whereas the bodies of the crew were recovered, it might be that an examination of the wreck was never made given its location (did it sink, was it smashed up and washed away by the tides?), since not even the full fuselage code of the aircraft is known.

Hope this helps.