Here's all three Vampire Variations sets. Breakdown below:

Disc 01:

01~19: Vampire Variations: A Musical Tribute to Castlevania (KNGIA-0002, 2011 - http://vampire.ocremix.org).

Disc 02:

01~24: Vampire Variations: Volume II (KNGIA-0005, 2013 - http://vampire.ocremix.org).

Disc 03:

01~24: Vampire Variations: Volume III (OCRA-0054, 2015 - http://vampire.ocremix.org).

https://www.mediafire.com/file/psj0rtn1zgj5wji/Vampire_Variations_Team_-_Vampire_Variations_Trilogy_%282018%29.rar/file

https://vgmdb.net/album/29154

https://vgmdb.net/album/42516

https://vgmdb.net/album/55493

EDIT: I just remembered the MP3s aren't 320-quality, but variable bit rate. I apologize for this oversight: force of habit.