I got one on Ebay for 99 cents with $2.00 S&H. $3.00 total. VERY NICE. I also got a Universal one (though Ive never been to Universal) for 50 cents at a yardsale. Got a third one (my favorite... it has a very soft strap, and I hate things on my neck) free as a prize from AllEars in a gift pack for an essay I did on one of their topics.
Ebay is the cheapest "easy" bet.