External trim and plastics

Hi,
I have just brought a 2006 Nuevo auto sleeper and the plastics and trim strips that hide the screws round my gas locker have become brittle and yellowed over the years. The parts don’t seem easy to find and I was wondering if anyone knows where you can get parts for the outside 
Thanks in advance

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Would be nice if you'd say hello here as requested....

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As you'll see from the link Paul gave above, there are quite a few different profiles and colours available so you need to be sure of what you need before risking ordering the wrong part online.

I took a short piece of our old strip to our local caravan & motorhome sales and accessories dealer and was able to match the correct type, which they sell by the metre.

Cheers the profile of mine doesn’t look like those on the picture so I think I’ll take your advice 
Cheers