Referring to HondaMan's tips on improving the handling of my CB750, I have found the Timken upper bearing (07100) and what Timken refers to as the bearing "cup", and the lower bearing (L45449), but no associated "cup".
Believe it or not, I found them on Amazon.com The upper bearing and cup are $28.40 and the lower bearing is $10.63.
Can anyone point me in the proper direction?