I need a listing of the following:

List of advertising agencies who hire third party production companies
to shoot commercials, etc. with contact info.

List of production companies who are being hired to perform those
duties mentioned above, with contact info.

List of current low end tv advertisers, example: John's Law office,
joes Salads...etc. with contact info.

List of media services providers for low end tv advertisers, example,
adelphia media services, with contact info.

The lists can be assembled separately, and this search should only
encompass the southern california region.

Thank you,

Chris Baker