I found some of the pyramid parts in Castaway Stories. All of the new pieces except one copy of the open door are decor and found under "rocks" as that is where the original parts are found.
There are two versions of the open door, the decor version and the wedding arch version.
The decor version of the open door has it's footprint back and off to the side so that move objects won't need to be used to place it.
The wedding arch...