Are you looking for Corporate Partners?
You need to check out Author Source and their Sponsorship Marketing Program. They DO IT FOR YOU!
Author Source President Mitch Mortimer and his team have years of experience selling sponsorship for clients including working in NASCAR. They help you build your Sponsorship Platform and then they go out and find you sponsors. They are out there and want to give you money! You owe it to yourself to check these guys out.
http://www.sponsorshipmarketing.biz