In the Netherlands is a shop called "Rotorshop" that specializes in rebuilding RX8 engines. They have lots of scrap housings and rotors that they sell as a set for you to put on the mantelpiece or in your mancave.
Price is 80,- Euro's for a set. It is delivered clean and shotblasted.
So if you want a set contact them at "Rotorshop.EU" via Google.
Jannes