FWIW, the Bowlingual is more of a gimmick than anything. I don't think it's too accurate, but it may be a cool toy to play with:
http://www.abc-7.com/News/DIW/bowlingual.shtml
But if you really want one, it's only around $40 now:
http://www.advancedpetproducts.com/p...?products_id=6