I'm the proud new owner of a pre-loved 2012 Stelvio NTX

, and as I ride on some fairly average roads would like to add a guard to the oil cooler to protect against stone damage.
I contacted Radguard here in Oz and they advised me that their guard only fits 2013 on models. Does anyone know what the difference is between the oil coolers on the 2012 and 2013 models?
If I can't buy one to fit I will consider fabricating my own mesh type guard (the ones with large holes would be useless to me). Has anyone on here fabricated their own guard?
Thanks
John