Replacement window for ford transit frontier

If it is the same as one on the other side you could get one made using that as a profile perhaps. Not the cheapest option though. No idea what size your window and assume that you have tried the usual breakers sites.

http://caravanwindows.co.uk/broken-caravan-windows/

Thank you for your reply, I have tried numerous breakers sites, but not the one you have kindly sent me a link for, so I will try this first.