I need to know how cell phone ownership in the US breaks down by model
and carrier for at least the majority of the cell phone owners/carry
combinations.
 ie. data that could look something like this:
       Motorola V300 - Cingular 6%, ATT 1%
       Motorola V400 - Cingular 4%, ATT 5%
      Nokia 8310 - Sprint 3%, Cingular 4%

Where the % is the % of all mobile users in the US.

Possible ways to answer this question in order of preference:
 1.  Find a free source or sources that cover a significant percent of
the market (ie. at least the top 40-50 phones).  This might be work to
pull togeather but providing this well will result in a nice tip.

2. Find the cheapest single source that this data can be purchesed from.  

3. Find the cheapest combination of sources that this data can be
pulled togeather from.