Need vocals for a cover song.

I would be interested in getting a vocal cut for a cover song that i am trying to produce in a more chill tropical manner, with a singing vibe similar to this one right here : https://www.youtube.com/watch?v=bh-9_tDL3zc . On the original the guy sings it really harsh but we are aiming for a mellow and sweet deep vibe-ish interpretation. I have attached the demo with my production so you can hear exactly what i am talking about, so please let me know if you would be down to doing it and that would be the fee for such procedure . Thank you so much! Alex