Sissy Bar/back Rest

Hi all,
Apologies if this has been asked before but will an air cooled triumph bonnie factory sissy bar fit a T120 factory mount where the standard grab rail attaches pls ?.
Wife has had a shoulder op so can’t use the grab rail but struggling to locate a sensible price 2nd hand sissy bar that mentions T120 but lots more about for earlier air cooled 865 bonnies.
Thanks in advance

 

Thank u mad.
I was wondering about the earlier, air cooled 865 ones. The back rest & top of the frame are a different shape but the bottom parts look the same but the mounting dimensions may be different