Not had to do it myself but I do have the D.D.(E.) for a Bren to Vickers tripod adapter. Also got the drawings for various other Bren mountings like for the Pedestal, Motley etc.
I've not loaded my files onto the new computer so can't say exactly what . Kev, Do you have a list of the mounting DD(E) ? I know theres the Indian para Bren tripod that was a rip off of the M1919A4s so that may be of use.
ATB
Tom