Harvard instructor Simson Garfinkel offers a web service which creates custom lined notepaper PDF documents for download.
The PDF includes your name and an "if lost please return to" note, a place to record page number, a small monthly calendar, and an optional notes summary box. Choose the font family of the text and whether or not the paper should have punch holes for perfect binder filler. This is also a great way to recycle printer paper at the office - print out notepaper on the blank, unused side.