In one of my sprinters, the radiator support is further forward, so a standard hose fits in.
However the sprinter that still retains the factory radiator support, I got the hose housing that bolts to the head near the CAS cut and welded a curved tube in there to sit the outlet further back and across, then just used any old bit of hose.
So basically we just cut and my mare tigged it to work, I can get pics if you really want.