Thanks for the feedback to my question. My headlight does have a 7 inch sealed beam.  I live in a country town and I think that next time I visit the city, I'll visit a Yamaha dealer and see if they have a listing on the US hooded headlight rim.  If not, I'll try and contact a Yamaha dealer in the US and buy one that way.  If I do that, I'll just have to hope it suits my headlight.  Thanks again for your help.  Les.