Ive had several plastic whistles break (the nipple tip that attaches it snapped off) and would like to add a metal one to my key ring EDC. I am sure Mr. Atwoods products are great but are out of my price range. Way out. The cheapie one from DealExtreme looks much too big and I am leery of most of the no-name stuff on eBay. So: Anybody recommend a source for good, inexpensive, key ring size, metal whistles?