Ask HN: How to request permission for logo use from large companies?

I make my living by selling developer tools. My tools are used by some household name companies, and I'd like to request permission to use their logos on my website. However the likes of Amazon and Netflix don't make it easy - on Netflix's brand assets site for example, in order to create an account they require you to have a contact at Netflix specified. What's the best way to go about this?