Redownload apps, music, movies, TV shows, and books from the iTunes Store, iBooks Store, and App Store - https://support.apple.com/HT201272
iTunes Store: Hiding and unhiding purchases - http://support.apple.com/HT201322 - tip: https://discussions.apple.com/thread/7044546
Legal - Apple Media Services - Apple - https://www.apple.com/legal/internet-services/itunes/us/terms.html - "REDOWNLOADS You may be able to redownload previously acquired Content (“Redownload”) to your devices that are signed in with the same Apple ID (“Associated Devices”). You can see Content types available for Redownload in your Home Country at https://support.apple.com/HT204632. Content may not be available for Redownload if that Content is no longer offered on our Services." Always download everything and keep multiple backup copies on local storage.
I just checked online and it does appear in the iTunes Store.