Murph - am thinking also along the lines though of maternity bridal wear, ie bridesmaids dresses. My twin sister was six months pregnant for my wedding, couldn't buy anything too far in advance 'cos obviously she didn't know what size she was going to be, but also was fecked if she was going to pay out big money for something she would definitely only get one wear out of. Luckily she managed to get something and had it altered but she'll never wear it again. And then shoes etc as well. I know, as far as she was concerned, she would certainly have hired out something if she could have.
SIL and I thinking it might be something to look into..