Peugeot Boxer Engine Compartment Water Ingress

The problem of rainwater getting into the engine bay of Peugeot Boxer X250's seems to have been know about for some time - see this link :

http://www.youtube.com/watch?feature=player_detailpage&v=9un3PN2lia4

The water overflows from the scuttle and settles on top of the engine block causing the glow plugs and other components to rust.  Peugeot say this is only cosmetic but over the lifetime of a motorhome, I'm not convinced.

Has anyone had an engine cover fitted to resolve this problem - if so, by whom ?