I've got one of these installed on my '94 R100GS. It's doing good service and I plan on keeping it for several more years. It was one of the ones that had a lower rod end attachment failure and I'm assuming that Progressive did a rebuild on it at that time. What I need is the part numbers for the lower rod end bearing and associated hardware that Progressive supplies with this unit - from what I've read in the past on this Forum, you can buy them from their parts department. Progressive is now supplying a 'Series 465' style shock for installation on this bike and my emails to their tech support department have gone unanswered - my guess is that they would rather sell you a new shock instead of supporting their older product line. Does anyone have a parts list for the older 'Series 420' shock or has had success buying these items from this company? Thanks for your help.