You may want to google that, there are many different shops that offer housing for blackberries, mostly online.
I haven't ever seen a store that you could go to to purchase that as well as have it fixed. http://www.google.ca/search?hl=en&q=...meta=&aq=f&oq=
I googled it for you, check some of those links
And a search of the forums got this: Blackberry Repair shop in New York City