Plant has said he isn't interested in a Zeppelin reunion because he is hard at work on other projects.
Jones told BBC Radio Devon the band is looking for a new singer to replace Plant.
The famed rock group reunited for a concert in London last December. Since then, rumors have been rampant that the surviving members of the band, along with Jason Bonham, the son of late Zeppelin drummer John Bonham, would start collaborating again.
"We are trying out a couple of singers," Jones told the BBC. "We want to do it. It's sounding great and we want to get on and get out there."
He emphasized that he, Bonham and guitarist Jimmy Page don't want someone doing a Plant impersonation.
"It's got to be right. There's no point in just finding another Robert," Jones noted. "You could get that out of a tribute band, but we don't want to be our own tribute band."