Here's yet another endorsement thread for TB.

I've got some questions, that maybe some of you guys can help me out with.
Me?
I'm a bassist that works for a production company that does work for national TV. You'll never see me, but you might hear me if you listen to VH1 or MTV.
While I pretty much just use Fender basses, I wouldn't endorse them. (No point, as I already own everything I want) I guess technically I already endorse them, though I don't get anything out of it.
However, there are string brands I like to use, however strings are very expensive, especially in the quantities I use. (I use Rotosound and DR for the most part for lack of anything better)
How do I go about asking a company for an artist relation?
Do I link them to my website, which doesn't have much material on it, or to the production company's website? Do I prepare a press kit? If so, how?
Any help would be appreciated.