So, got an answer from the guys at DS. ECU only they promise 199kw
at a price of EURO1800. Procedure is then as follows: you send them your ECU, they upgrade it, and send it back to you. This means, however, that you will have to do without driving your QP for the time it takes (airfreight to Germany, updating by DS, airfreight back)
Apparently they can also provide warranty (at extra cost) on the engine and further drive train, but whether that makes sense for you down under remains to be seen.