Accordion part for song

Hello! I have a song that I would like to add accordion to. I am not looking for anything super complex or intricate -- I just would love for the accordion to play the chords of the song with maybe a few fills and embellishments here and there. I'd love for this song to have a vintage, nostalgic feel, and I think the accordion would really help to cultivate this sound. I've attached a rough demo for reference. Thanks :)

Additional info:
The song has less than 10 tracks recorded that need mixing.