I think we are going to need pictures of said crew to give any meaningful recommendations... <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />
Seriously, if you're going to buy her a dry suit for next season, why not just buy it now. That, or buy her a cheap wetsuit...chances are she won't want to use the full length wet suit next season after she gets the dry suit.
I bought my girl a like new Body Glove full length wet suit off ebay for $15. It's perfect for her in cooler weather. FWIW, I bought her another one before I found the one she has now, but it was too small (short) for her. It's also a Body Glove and is basically new, minus the tags. It's a size 7/8, if you think it might fit your crew you're welcome to have it for $20 plus shipping. <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />