Where can i find one of those and how much?

I heard this was a diploma project of an engineer's intern at Schwing in Germany. Somebody apparently offered $50,000.00 for that pump. everything is made to scale (I guess he had access to all the drawings)  the hydraulics are ridiculously small, and of course expensive, I know the hydraulic pump is ~ $3000.00

Schwing Concrete Pump / Betonpumpe 1:16 outside details - YouTube  Don't know if that link works, couple more vids on youtube showing rock valve and aggitator.

A Friend of me built this modell during his apprenticeship some years after I finished mine. It was espacially built for a BAUMA showcase at which a Saudi customer offered 75.000$. 

He had all the drawings and financial backup from Gerhard Schwing and Schwing GmbH. 

Found these on the net a log time ago.