those spindles are getting a little bit harder to find now, many of them have the threads all *****ed up right where you need the lock ring washer tab to sit. They are over $300 each new
I keep a box of spares, but now I am thinking of going D44 ttb so I may not need them
I have found over the years running 35's on the d35 ttb why the outer jamb nut works its way loose and you end up with loose wheel bearings. A real simple trick is to take the lock ring washer and add a little material to the tab with a welder, then file it back down until it fits the groove EXACTLY with no side to side play. That tiny little bit of side to side play that a worn out spindle or even new lock ring washer has inside the groove is what works them loose, slowly. Warn used to make a fix for this, basically they added some set screws to the jamb nut so it would lock up against the ring tight. For me I just get new lock ring washers that fit the groove the best they can then add a tiny little tab on one side with the welder, file it back down to flat and when it fits in there snug you are good to go. I have not had a wheel bearing issue since and I run 35's with a ARB locker