Ping when you're winning

I’d like to introduce you to my new friend - and my scrappy handwriting - the new friend is the bell. In a blog wormhole a couple of weeks ago, I came across an anecdote about a writer whose husband bought her a desk bell to ping whenever she had achieved her 1500 word-count for the day. A clever reward - notice, no calories in sight? So I made a mental note to find me a bell of my own, while also wondering, where the hell I would find such a thing?