You can buy proper mudflaps for the front, either from your Fiat/Peugot/Citroen dealer or maybe on ebay. Easy enough to fit (make sure you fit them on the correct side) and are really good at keeping the cab and front section clean.
As for rear, because of the sheer number of different layouts, there doesn't seem to be a standard although I've read on another (!) forum in the past about people making their own up from ex-lorry mudflaps. No idea about dirt skirts - don't see them all that often.
thanks for getting back to me, i will look at the suggestions. you would think they would come with them already fitted. anybody any info on making your own for the rear and how to fit them. thanks , siddle.
Search on eBay for rally mudflaps, and you get the large sqaure polyurethane sheets like fitted to the WRC rally cars, easy to cut to shape, I screwed mine to the inside edge of the metal inner wheel arch on the rear arches, assuming yours is the same, they look good