Would any of these work? Could be a bit boring by the looks of the Peacock stuff but you should be able to wear when you get back, I have the black Kimono dress and it still looks good after pregnancy, again I dressed it down/up depending on accessories.
http://www.jojomamanbebe.co.uk/detailfash.php?type=FASH&code=A9754&proddesc=Print+Tea+Dress&supercategory=BRN00046&branch=&wcategory=CAT00312&catdesc=&super=0070BRN00046~0010BRN00055~0020CAT00312&treecode=TRE00009
http://www.jojomamanbebe.co.uk/detailfash.php?type=FASH&code=A9753&proddesc=Polka+Dot+Kaftan&supercategory=BRN00046&branch=&wcategory=CAT00311&catdesc=&super=0070BRN00046~0010BRN00055~0010CAT00311&treecode=TRE00009
http://www.jojomamanbebe.co.uk/detailfash.php?type=FASH&code=A9380&proddesc=Black+Jersey+Kimono+Maternity+Dress&supercategory=&branch=&wcategory=&catdesc=&super=0070BRN00046~0010BRN00055~0010CAT00311