hi, need male vocal for a commercial

My name id Flavio, i'm a composer musician in Italy but i work for europe and USA for advertising. i'm doing a cover version of THE DEVIL WENT DOWN TO GEORGIA, by Charlie Daniels, done by Zac Brown. i will re arrange the song more electronic and rock i i will like to know if someone here can sing it and how much will be the cost of a demo and, if the client like it, of a buyout for usage ( this will be 1 day in television in USA and Canada and 1 year in internet).