Yes, you can purchase plus size bras on the following website: http://www.barenecessities.com/. They sell regular bras as well.
Underwired bras give more support and for your size, I think you should. Age doesn't matter when it comes to bras, only size and comfort. :D
I'd assume you'd have to be a size B to start buying B sized bras...
The largest plus size bras come in size 55DDD. That is the largest I could find through online retailers.
The store lanwbryant offers plus size bras on their online website. you can shop online to buy these bras. http://www.lanebryant.com/sexy-plus-size-intimate-apparel/4043/index.cat
No, but there are preteen bras that would be in the size of an AAA bra size. It would probably be in the size 12-14 bra.
What size bras does my mama Cocina design wear what size bras does My Mama Christina Devine where
Victoria Secrets does sell a wide variety of plus size bras. I would prefer you purchase your bras there. They sell lots of sizes and styles.
Cacique Bras normally are plus size bras. They come in larger sizes and are for larger women. They are also for women who just have larger busts and need a larger cup size.
Walmart
intimatelylingerie.com.au/size-chart.html
Yes, they do make sports bras for plus size women. Just My Size has many different sizes and styles of sports bras made specifically for plus size women and women with larger breasts.