There are many breast enlargement and firming OTC products but I will advise you not to use these products as they can cause serious side effects. The exercise can be make the breast firm. There are also reports of breast enlargement by exercise. The exercise bar which you are asking is called easy curves. I am also giving link to another website which might be helpful for you. Visit easy curves, Exercise for breast.
Learn the modified push up. It's easy and effective.
Do some simple but effective exercises, which will help you strengthen the pectoral muscles by yourself.