Your Stage : Looking for suggestions on Sponsoring a Documentary Film by Steven Harris Anzelowitz

We plan on shooting a documentary film in New York City later this year. We are looking for suggestions on ways to get corporate sponsorship for the film. We have a small list of corporations that tie in nicely with the concept of the film. And we have sent out query letters to them on taking a meeting. My question to the community is does anyone HAVE A LINK TO AN ARTICLE IN RED THAT WOULD HELP. I am sure we all have our opinions on how to approach this and feedback is most welcome. The topic of the film deals with immigration. We feel it is relevant considering the current political climate.