Let me check and help you with the bagger details.
Thank you for waiting. I have checked and see that we do not have the bagger for this model available on Sears. However, I have checked and see that it is available on other website . Let me help you with the link so that you can purchase the bagger
Please click here to view the link:ebay.com/itm/JOHN-DEERE-BM21889-BG20777-Twin-Bagger-kit-100-Series-Lawn-Tractors-w-48-decks-/201239940389
There are available on other websites as well. You can check with the part number BG20777
My online resources shared all this helpful information.