Who makes maternity tops that double as nursing blouses?

There are several makers of maternity tops that double as nursing blouses. You can find them at Motherhood Maternity, http://www.motherwear.com, http://www.glamourmom.com, and even http://www.Amazon.com/Lantern-Sleeve-Maternity-Nursing-Top/dp/B002Q0TMTM. They can be a bit pricey at around $50-80.