RXV Spindle bushing/king pin

[DanO2346]

I’m sure this has probably been mention, however was unable to locate a thread when searched. I’m switching out a spindle lift for a RHOX a arm lift. I’m supposed to use the same spindle bushing but they seam to be different sizes. Instructional video shows the bushing being popped out an put directly in the new spindle. The ones on the spindle lift have brass caps of some sort on the ends and a smaller diameter pin inside. Trying to find where to purchase what would have been the original bushings. In searching all I can find are king pins that look to be the same size and the ones from the spindle being replaced. Any help would be appreciated, thanks!