Sorry for all the questions, but new to water cooled vans??

Aske me about splits and I dont have a problem but the new stuff, no idea.

Where can I find a wind deflector ?? the one on the passenger door is broken and I have been to a few gerneral parts shops, like Motormate, Sprints, Super Cheap, they have looked though their books and cant find anyone who stocks them??
Do I have to get one from the UK??
Thanks
Dave