I bought a replacement passenger side mirror (just the glass part) from In Line Tube for my 1972 sport mirror - the orginal was badly cracked so I removed it and threw it out a couple of months ago. What I received was just a flat mirror, and I think I might have needed to reuse the part that actually held the mirror in the housing. Can anyone post a pic of what holds the mirror in place in the housing - and by chance someone have that part for sale?

 

Found the old part - had not thrown away after all.