"I wonder if it's still in AIX."

  lslpp -l|grep -i motif
  X11.adt.motif             7.1.5.31  COMMITTED  AIXwindows Application
                                                 Development   Toolkit Motif
  X11.compat.lib.X11R6_motif
                            7.1.5.31  COMMITTED  AIXwindows X11R6 Motif 1.2 &
  X11.motif.lib             7.1.5.31  COMMITTED  AIXwindows Motif Libraries
  X11.motif.mwm              7.1.1.0  COMMITTED  AIXwindows Motif Window
  X11.msg.en_US.motif.lib    7.1.3.0  COMMITTED  AIXwindows Motif Lib. Msgs -
  X11.msg.en_US.motif.mwm    7.1.3.0  COMMITTED  AIX Motif Window Mgr Msgs -

  oslevel -r
 7100-03