I don't know with DA Tegs, sorry, but i can help u with the EGs since i have 1 myself

lower spec EG (breeze/GL/GLi) can use stock Si/VTi rear swaybar, but u have to get EG Si/VTi rear LCAs (they have rear swaybar mounting holes while the others don't)...

U also have the option to use DC2 or DC2R rear swaybar...DC2 rear swaybar has exactly the same diameter (14mm) as EG Si/VTi, and u have the option to use DC2R rear swaybar too, however, u need to use rear subframe reinforcement kit such as ASR, Whiteline etc to prevent any subframe tears and also to have the same swaybar subframe mounting points as the DC2R rear swaybar...

hope that helps and not confuse u even more