Renault Mascott rear axle ( Iveco ???? ) HELP PLEASE?

I have a 2001 Renault Mascott 5.5t RWD twin-wheel minibus with diff problems. I'm having trouble locating a rear axle as these are pretty rare. does anyone know if an Iveco axle would fit ( just guessing really as the engine etc. is renault badged iveco, not renaults own ).

Any help is appreciated, even if its only a referral to another site or forum that can help me further.