Is there a way to use items from other mods to use in custom villager trades

I was wondering if there was any way to "import" items into mcreator to use for villager trades. In the villager trade code the item names are in a format different to their regular item IDs (eg... minecraft:bone_meal is now Items.BONE_MEAL) so it would also help if anyone knew how to get hold of these different IDs for items from other mods.