What kind of drain rod do I need to get around this bend?
Not sure where you're from, but here in the US we'd use a plumber's snake (also known as a "drain auger", or simply "snake", or "auger") to clear the drain.  A snake is quite flexible, and should have no problem getting into that drain. You might, however, have to remove the drain cover to get the snake in (depending on the size of the snake).


"Handheld-Drain-Auger" by Pgdp123 - Own work. Licensed under CC BY 3.0 via Commons