Get the latest vgmstream
and rename the extension from .dat to .hca
You can also use vgmstreams test.exe to convert them into .wav files
That didn't seem to work for me, I believe because of the .HCA's being encrypted. When I tried to run it through HCA_Decode v1.16 it asked for a decryption key. However, I do not have the encryption key for these files and don't know how to get them. Did the sound file work for you when you tried the VGMstream method?
Edit: When running it through HCA_Decode v1.12 some files came out fine while other files had errors. About 700 of the 1500 came out correctly.