re-downloading songs

I had problems syncing some songs from my iTunes library to my Sonos music library (some but not all songs in one album synced), so I decided to delete the album and re-download it. I saw a message saying the album would now be hidden.

When I try to download it from the store, it does not give me that option. Navigating to the album shows that it is purchased, and there is no option to download or even purchase it again. How do I get it back? It still appears in the iTunes library on my iPhone.