Newbie needs a hand with Blackberry parts

Hi there....I'm looking to find parts for older Blackberry phones. I need battery doors for the discontinued BB 7520 for Nextel. I've had no luck on the internet, ebay, google, or other forums, other than finding one or two at a time for very high prices. I know it's an old model, and I need a bunch of them, 100+. Maybe someone on here knows of a company that sells older discontinued cell phone parts???

If you could please reply or PM me I would sure appreciate it. :O