both elephants are the same, but have a different colour AND a different number.
People find and choose one elephant and pick a non-existing colous (light/dark
gray, depending on the elephant). My suggestion would be to consolidate the elephants
into 1 single catalogue-item with two colour variants. If you found elephant
nr. 1c02 it seems now both colors come from the same set. One has to search for
the other elephant to find info on the other set, but you can't know it exists,
because there a two colours offered for sale for each elephant.