Billy bookcase, shelves, extension, doors (Haynes MK45)

Any spare bookcases, shelves extensions or doors please, for double billy bookcase, in oak or white. Condition not too important as we can fix / paint / cover where necessary. We would be very happy with the shorter double units too. To help accommodate my daughter's book collection as she has turned into quite a reader. We can collect from most places in Bedfordshire. Thankyou.