Carragher will hang up his boots at the end of the season.
"We'll have to get somebody to replace Jamie Carragher and Brendan did mention in his press conference [after Everton] that he will look hard and long to replace him," Evans told Liverpool's official website.
"But the trick is that you don't replace Jamie with someone like him; you replace him with somebody different, because there isn't another Jamie out there.
"There's somebody different - a different type of centre-back. You have to get one of course. You have to get one that can play with Daniel Agger, Martin Skrtel and the others.
"We've got a couple of young lads who are desperate to get in [to the side] as well. We've got to fill a void in terms of Jamie's personality and his ability."