I've been using one from Motherhood Maternity and it helps a lot. I don't wear it everyday and it's not always comfortable to sit in but it helps so much when I'm doing a lot of walking or at the end of the day I will strap it on when my back starts getting tired.
Re: pregnancy support band ?
BFP 1: 9/15/2013 | DD 5/23/2014
BFP 2: 9/15/2015 | EDD 5/26/2016