A crowd funding campaign has raised more than $120,000 to fund their trip.
But survivors want assurances they'll be allowed into the same room as the Cardinal.
Anthony and Chrissie Fosters' dealings with George Pell go back almost two decades, to his time as Melbourne's Catholic archbishop.
"We have seen varying responses from Cardinal Pell over time, very verbal responses. What we need to see now is action from the whole church. What we really need to see is a truly compassionate response that returns victims lives to what they should have been if they hadn't been assaulted. That's what really counts and that's what the church is refusing to do."
Their two daughters were abused by Father Kevin O'Donnell - a convicted serial paedophile priest.
The Fosters want justice for victims like Katie and Emma, who subsequently took her own life.
Chrissie Foster says they've heard many words from the church hierarchy - but few answers.
"Answers from him, answers from the church, have been very very difficult. They are untouchable. They say one thing publicly and get a lot of attention and the positive message goes out but when it comes to doing what they say they will do, it doesn't happen."
Next week, they're planning to travel to Rome, hoping to hear Cardinal Pell give evidence by video link to the Royal Commission.
And thanks to an extraordinary successful crowd-funding appeal, they could be joined by several survivors of abuse, like Stephen Woods, who was raped by a Catholic priest in Ballarat.
"We are blown away by people's response to this. We are absolutely amazed and we are so thankful to people are saying we are with you, we believe in you and we want you to go forward."
Cardinal Pell - who has previously testified twice before the Royal Commisson - and his doctors say he's is too ill to travel to Australia to attend further hearings.
Stephen Woods says survivors want the Rome appearance to be held in an open forum like the Australian embassy, rather than the Vatican.
"So that survivors can go and look into the eye of Cardinal Pell and his lawyers and say, 'we want the truth', Australia deserves the truth."
The funding campaign to get them to Rome has also been boosted by proceeds from the sale of an acerbic song by musician Tim Minchin.
"We all just want you to come home Cardinal Pell...I know you're not feeling well and being crook ain't much fun...but even so we think you should come home."
And it comes as the church overhauls its treatment of abuse complaints.
Catholic dioceses have now effectively cleared the way for past victims of abuse to sue for negligence, even if the alleged perpetrator has since died.
This follows previous cases where legal claims against the church failed because the accused priest was no longer alive.
The Bishop of Ballarat, Paul Bird, has volunteered himself as a defendant.
"The bishop carries the history of the community with them so if the community in a way is going to address the history they can do that through the bishop."
The commission has heard Bishop Bird's diocese was the scene of widespread abuse for decades, much involving notorious paedophile priest, Gerald Ridsdale.
