Best redux way to extract an item from an array

current-actions.js

let action = (id, items) => {
  return {
    type: ACTION_TYPE;
    item: items.filter(i => id === i._id)[0] // item with id will always exists in the array
  }
}

current-reducers.js

let item = (state = initialState, action) => {
  switch (action.type){
    case ACTION_TYPE:
      return Object.assign({}, state, action.item);
    // other item properties update action handlers.
  }
}

maybe-better-way-actions.js

let action = id => {
  return {
    type: ACTION_TYPE;
    item_id: id
  }
}

maybe-better-way-reducers.js

let items = (state = initialState, action) => {
  switch(action.type){
    // array items handler
  }
}


let itemById = (state = initialState, action) => {
  switch (action.type){
    case ACTION_TYPE:
      //get item with id from items reducer somehow. 
  }
}