Summer Internships without a Business Major?

Right now, I'm in undergrad, but I'm not a business major (I'm in engineering instead). I'm having a tough time finding summer internships that don't require a business major, or a high level degree. Has anyone else been in the same boat? Or have you guys worked with non-business majors during internships? Also, are there any really good websites for finding a list of internship openings?

Thanks in advance.