Not aware of any OST for this but ideally after FLACs. Breathe on me, found online has an audio glitch.
After Breathe on Me, Free Bird, Just Wanna Be and Time Waits For No One in something better than 128/192 thanks.

Sorry, finding FLAC of Project ARMS music is nigh impossible. There are actually two OSTs for ARMS but they are so elusive I think no one ever got those. There's not even low quality mp3s anywhere. It's almost like there is a conspiracy behind ARMS music, it has completely wiped out from the existence.... Feel free to prove me wrong.