Hi There maybe you should try here:
Gokaiger Soundtracks:
J-SONGS: Kaizoku Sentai Gokaiger - Zengyoku Shu KANZEN Best Otakara Song Box (
http://j-songs.blogspot.co.uk/2012/02/kaizoku-sentai-gokaiger-zengyoku-shu.html)
J-SONGS: Kaizoku Sentai Gokaiger Original Album Otakara Sound Box 3 Kaizokusen VS Yuureisen (
http://j-songs.blogspot.co.uk/2011/11/kaizoku-sentai-gokaiger-original-album.html)
J-SONGS: Kaizoku Sentai Gokaiger Mini Album 2 (
http://j-songs.blogspot.co.uk/2011/07/kaizoku-sentai-gokaiger-mini-album-2.html)
J-SONGS: [Discografia] Kaizoku Sentai Gokaiger (
http://j-songs.blogspot.co.uk/2011/06/discografia-kaizoku-sentai-gokaiger.html)
Tokumei Sentai Go-Busters Soundtracks:
J-SONGS: Tokumei Sentai Go-Busters Original Soundtrack Soundmission 1 (
http://j-songs.blogspot.co.uk/2012/07/tokumei-sentai-go-busters-original.html)
J-SONGS: Tokumei Sentai Go-Busters Mini Album 3 (
http://j-songs.blogspot.co.uk/2012/08/tokumei-sentai-go-busters-mini-album-3.html)
J-SONGS: Tokumei Sentai Go-Busters THE MOVIE Tokyo Enetower wo Mamore OST 3 (
http://j-songs.blogspot.co.uk/2013/02/tokumei-sentai-go-busters-movie-tokyo.html)
there is a lot of Sentai & henshi etc, music on this site, it's were i get most of my sentai music, hope this helps :)
GRKA :)