Looks like REX is making a move to pick up some of Virgin's leased B737s which the airline no longer needs, see https://www.executivetraveller.com/n...ed-boeing-737s
I don't suppose that Rex could keep Virgin's seats, in fact they'd probably want to replace them and maybe even extend the 3-3 economy rows through to the former business class cabin and make this an NZ-style premium section with an empty seat in the middle.