chaly cf70 number plate tail light bracket

wanted a chaly cf70 number plate tail light bracket , bought this as a restoration project
and this bracket is missing , person i bought it from doesnt know where this part is , the year of bike is 1975 . done a online search by part number which is 84701-124-600B no where seems to have it also checked the usual auction sites with no luck . if anyone knows if i can fit a alternative bracket instead , and where i could buy this , thanks in advance Darren