A Baccus, A Kwon (if we could get him), a Fraser, a Tanser , or if you want to talk strikers someone Robbo can improve like Mandron or Toyosi
Dont get me wrong if Robbo went for him he would get my full support but at 32 he is at or just passing his peak and going downhill from here. Will he still score goals, yes but will he improve, unlikely.
Saints currently play a high energy and tempo game (most of the time anyway) and that needs younger legs to keep it up for 90 mins.