There is a Black Hawk helicopter in Brazillian army colors here on page http://www.simviation.com/fsxhelicopters2.htm. ; There is also a Sea Hawk here on page http://www.simviation.com/fsxhelicopters1.htm. ; It is the naval version of the UH-60.  As for the F-111, I am not sure.  You could try Mike Stone's model.  It is for FS2004 and is available here on page http://www.simviation.com/fs2004military72.htm.