Hobby Lobby has some fabrics that incorporate the same colors. Could you show us your quilt and a link to the pattern so that we might make other suggestions, just in case you can't find the exact fabric? If you have a Hobby Lobby in your area and think you can use a similar color although not the same, take the piece you have in there to see if you like anything they have.
http://www.hobbylobby.com/Fabric-Sew...quickview=4166
http://www.hobbylobby.com/Fabric-Sew...kview=80814292