Banksia Roses will strike from cuttings.  Use a long trough or tray and take cuttings as long a possible with as many leaf nodes as you can get.

Put it on top of the potting mix and peg it to the mix (I just use clothes pegs) to keep the nodes in contact with the mix.  Keep damp but not wet.

They can be slow but they will strike eventually.  Once you have a few plants that have taken, cut the original long cutting to free them up and repot individually.