You would never feared to buy a beautiful dress for prom from internet any more, but you may worry about the dress you receive won't fit. And custom tailor a dress from local store is really costly.
Here we get a place to be recommended for affordable custom made prom dresses: www.zoombridal.com
They provide large style selections, and you could even find a liked dress style from other place and provide the pictures to them to custom the gown to your size, do the dress exactly for you!
The price is really reasonable, you can't find a dress just for yourself from any other place!
However, don't forget to buy the dress one month before your prom cause it will take some time for them to make the dress for you from scracth!
Hope you could enjoy it

I'm thinking of buying my Prom Dress from the Peaches Boutique website. I found one I like on clearance and it's available in a size larger than what I normally wear. My aunt said she would take it in for me for free!!!!

Yups buy prom dresses online it will be fitted , i have tried it