Hello Lee,
I too have been researching the Wicklow Sutton's for many years.
I think I may have found a possibility for you. I'm wondering if your Anthony could actually have been born Arnold Sutton (20 May 1803 in Wicklow?).
Arnold had a brother Thomas (born 3 Oct 1790) who married an Elizabeth Gilbert. She married again to a David Edge. Children from these marriages were Thomas who died 1902 (married Frances Bennett), and an unknown female who married William Morrison.
Could it be possible that Elizabeth Gilbert then married your Anthony (Arnold)?
The Morrison family were in Canada as was another sister of Thomas, Elizabeth, who married William Bates.
I know it's a bit of a long shot but I think it may be possible.
Kind regards