Aly & AJ released the remastered version of their song from the Into The Rush era called “Chemicals React“. You can buy this song on iTunes for some money or stream it on Spotify or Tidal, or listen to the official audio on YouTube.
iTunes: https://music.apple.com/nz/album/chemicals-react-a-a-version-single/1634111579
More links: https://ffm.to/alyajchemicalsreact/