Dave, what I often do is find the part no via CMSNL or parts book and then look up Partzilla and put the p/n in (with the separating dashes). When you select the part it usually gives a list of bikes that that part is use on. Think yours is 15332-300-000 (a 750 part) and used on a variety of bikes. (But they only list late 750s??)
But sorry no spare here.