I have just realised that I don't have the tool for winding down the spare tyre on my Possl Roadcamp that is on a 2009 Fiat Ducato Base. I've been told by a friend who took a look at it that "the winch mechanism is near the rear wheel arch and has a socket that needs a pentagon shaped bit". Can anyone tell me where I might get that piece of kit. I'm not sure I could change a tyre myself but if I had the right equipment I could get the spare down at least.