Well that's a bit tricky, you will need to buy a flexshaft, motor mount , strut and prop (the 2mm graupner one will not fit), I would be tempted to suggest this one:
Hydraulic 1 wave plant 2mm BBmit aluminum rudder 1

But, I'm afraid that I don't speak German and therefore I am unsure as to what is a flexshaft and what is a solid (Babelfish struggles with technical descriptions), I do know that Hopf will cut the shaft to length for you to suit what you need as flexi's can be a bit tricky to cut yourself, the best advice I can give to prevent confusion is to PM Jan (Pomplebled) and ask him, he has WAY more experience than me in Pro setups and Is an alround nice guy, he'll help out!

Good luck, If I can help any other way I'll try