How to style each instance of a given word?

How to style each instance of a given word?

Here's my situation. I have a client, let's call them "BuyNow." They would like for every instance of their name throughout the copy of their site to be stylized like "Buy Now," where the second half of their name is in bold.

I'd really hate to spend a day adding <strong> tags to all the copy. Is there a good way to do this using jQuery?

Thanks!