You may be able to buy the carrier bearing but i would fab a replacement and make a template with wood and have a welder fabricate it. The carrier bearing needs to flex thats why it original was in rubber and UHMW around the bearing.
1. You need a flexible rubber insert inside the carrier- I suggest go to HD or Lowes, getting a rubber plumbing connector that is 1/4" smaller than the OD of the bearing. and stretch this over the bearing and cut to size to be slightly larger than the width of the bearing.
2. Build a wood block template (think two U shape blocks) that is the carrier block and put a 1/4" plywood on either side to hold the rubber in place.
3. Fit this to your baler make adjustments, then get someone to fabricate this out of metal, then install using the rubber to cushion the bearing and the bolts secure it around the bearing and provide the flex needed..
Look up carrier bearing and you should get the idea,