The arms that spread the guide wires? If so, This might work for you.
I have a few made out of wooden dowels that I keep on the boat for spares When I break the aluminium ones. This is only temporary, but I have used them for a whole season when Rupp couldnt get me mine due to it being back ordered.
Mine get broken when slipping up on the Maurice because of the tide range. Low water, a hard running current, and some heavy North or South winds will pin me on the poles backing in and if the head poles have any sort of inward lean they catch my lower spreaders.