Im still looking for a bonnet for my '78 120Y B210 sedan - am in Wellington, could drive to collect if nearby or arrange for freight.
The one I have is beyond salvage according to the panel shop
Can you throw us a few pics of it - I think BRDFLU has one he was holding onto for me that you could get to get you going again - was only going to be a spare.
Your damaged one may come in handy to make lightweight panels if its not too bad