Wanted Ivory Informal Gown Size 24 Fall Wedding

I am searching for an Informal Gown/Dress for my Wedding Vow Renewal. My husband and I will be married 20 years this October and will be renewing our Wedding Vows in an Outdoor Ceremony. I need a Plus Size 24 Gown. I cannot afford anything really expensive, I am looking for something really affordable, can be used as long as it is clean and pressed. If anyone has anything I would like to see some pics and talk about it first. Thanks!