Trojan 18?

After many years of good to excellent service, we notice the main shell has corroded. Large chuck has gone but it is still linked to wheels and motor. And still working but throwing grass and debris through the opened hole. No problem. Perhaps we should ear goggles.Can new shell be put on? How much this would cost? Or is it better to run it to the ground and buy a new one

Sydney Xavier
October 2010