This is the best bundle backport datapack for Minecraft 1.20.1.

The Best Bundle Backport includes:

-Bundle and its modern recipe (1 string + 1 leather)

-Dyed bundles (craftable and accessible via commands)

-Bundles as village loot

How to install:

Place the datapack in your world's datapacks folder and in your resourcepacks folder

Give Commands: Black Bundle - /give @s minecraft:bundle{CustomModelData:711} Blue Bundle - /give @s minecraft:bundle{CustomModelData:712} Brown Bundle - /give @s minecraft:bundle{CustomModelData:713} Cyan Bundle - /give @s minecraft:bundle{CustomModelData:714} Gray Bundle - /give @s minecraft:bundle{CustomModelData:715} Green Bundle - /give @s minecraft:bundle{CustomModelData:716} Light Blue Bundle - /give @s minecraft:bundle{CustomModelData:717} Light Gray Bundle - /give @s minecraft:bundle{CustomModelData:718} Lime Bundle - /give @s minecraft:bundle{CustomModelData:719} Magenta Bundle - /give @s minecraft:bundle{CustomModelData:720} Orange Bundle - /give @s minecraft:bundle{CustomModelData:721} Pink Bundle - /give @s minecraft:bundle{CustomModelData:722} Purple Bundle - /give @s minecraft:bundle{CustomModelData:723} Red Bundle - /give @s minecraft:bundle{CustomModelData:724} White Bundle - /give @s minecraft:bundle{CustomModelData:725} Yellow Bundle - /give @s minecraft:bundle{CustomModelData:726} Knowledge Book - /give @p minecraft:knowledge_book{display:{Name:'{"text":"Knowledge Book","italic":false}'},CustomModelData:711}

This datapack uses a Knowledge Book as a dummy item in recipes and changes its texture to look like a bundle. However, if you want to get the classic Knowledge Book, you can still do so using the command above