I don't think Penrith will target PJ for a couple of reasons.
1)Elliot likes to use youngsters. He's a crap coach but he brings young kids through very well. Penrith have the likes of Firman, Richie Williams, Jarrod Sammut and Geoff Daniela who can play in the halves, and whilst they are not proven first graders they all have potential (especially Sammut IMO) and Elliot likes to use those kinds of player.
2)Priddis and Aiton pretty much have to leave for him to play hooker. I've been told at least one is likely to stay, meaning PJ won't get the starting/80 minute role he wants.
3)Penrith have shown a reluctance or inability to sign bigger name players over the years, as have Elliot coached Canberra.