I have nothing on them but the Australian War Memorial (AWM) appears to have at least one SBC (which may be incomplete like yours). You could contact them. There was one recovered from a crash site in PNG recently and that may have gone to the AWM or to the PNG WM. I have a photo somewhere and will contact the person who sent it to me for identification and see what he knows.
https://ibccdigitalarchive.lincoln.ac.uk may be worth a call - they have a lot of miscellaneous documents that have been donated.
Otherwise all I can suggest is going through the document catalogues at PRO, IWM, RAFM and the NASM (Smithsonian).
EDIT - I looked in AP 1661 instead 1664 earlier.
I will post 1664 later today.
EDIT 2 - Sorry the person who supplied it to me will not allow me to post it but I can PM the diagrams to
L
Labman
. PM sent