Moved to the correct section. If you have a pick and pull kind of place, See if they have a Journey you can snag them off of. That way you can see how they are attached, which is by holes in the roof. Otherwise, check ebay.
https://www.ebay.com/itm/363710296655?hash=item54aed2b24f:g:28EAAOSwgWJh-Cit