One of the arms was broken through and I wasn't ready to let them go.
So in the great Australian tradition of a trip to Bunnings can solve everything, I ran down the road grabbed some things and bush mechanic-ed them back to health.
I reinforced the broken arm with some flat steel I super glued over the break to hold it together while I added a larger reinforcement to the outside of the arm. I attached these with clamps made from aluminium bar.
Now they're back in working order. Happy days.