These last days he released around six more or so.
Most of them around a euro or so.
So if using Caustic take a look here:
https://play.google.com/store/apps/developer?id=Teoti+Graphix,+LLC
here is the YouTube Playlist where it is possible to listen to them:
https://www.youtube.com/watch?v=qPzhr2CQoXU&list=RDqPzhr2CQoXU#t=0