Much to my surprise, the Ravelry page, which previously allowed for buying and downloading the pattern, said "Note: No longer available."
What? How could that be?
I actually felt physically nervous that I might not be able to get this pattern any more. Apparently I wanted to make it more than I knew. A serious Google-hunt ensued.
Thankfully I was able to find it available on the designer's website. But lesson learned: just because a pattern is available digitally doesn't mean it will always be available. If it's a pattern you really want, don't wait.