Trying to identify Pella Rollers

Hello, I recently removed a Pella sliding door to clean and lube the rollers, but clearly both rollers have bearings that are shot. I could not remove the roller assembly from the door (afraid to damaged it) so I took a few pictures that I thought would help me identify the assembly but later realized I should have taken the measurement I could. Anyway, I'm hoping you can help identify the assy from the photos.

The wheels pivot up and down slightly. The door is very heavy and has a two point latching system (top and bottom). Not sure any of these details helps in identifying the part but thought I'd mention them.