I've had some success taking cuttings and rooting them in water then potting them up. Once they start growing again, you can plant them out around the mama plants. It should only take a few weeks. Don't cut more than about half the plant of the tall ones at a time. Leave some leaves, give them time to grow new leaves, then cut the other half, so they will get bushy and happy again.
If you have lots of cuttings, you can also try 'sticking' them straight into some moist potting soil. Keep them moist, in the shade and spray/mist them with the hose for a week or so. You know they're making roots when you see new leaves starting. This works better in warm (not too hot) humid weather.
Keep the cuttings in bright shade, and only change the water if it starts getting funky. Most plants secrete their own rooting hormones so will root more readily if you leave them alone as much as possible.
