Call Freightliner parts
Freightliner installs the radiators and cooling systems. Give them a call...they are very good about helping with part numbers and will not pressure you to buy from them (which was always my worry).
Have the last 6 digits of your VIN ready when you call.
2008 Winnebago Journey 39Z DP
Cummins 350hp 6.7L ISB
Towing 2006 Honda CR-V LX