Dance animations with Music

I am trying to find dance anims that line up perfectly with music files. several sites I went to do not have them correctly synced, while others have no mp3s, and some just 404 entirely.

I am hoping people can share web links to where i can reliably find assets, or even upload what they voluntary choose to share.

Please and Thank you

There are a lot of MMD (motion) dances that people have ported over for different engines (e.g., Unity), I would do a search on deviant art, for example, Search 'mmd dance animation' on DeviantArt - Discover The Largest Online Art Gallery and Community