Aircreation have updated the English page on their website showing all the factory available accessories. The page is here; http://www.aircreation.fr/en/catalog/accessoires-et-instruments_145
Worth looking at is the Tanarg trailer, it looks to be a very well built trailer and, knowing Aircreation, is probably of the same high standard as their aircraft.
The Helly Hansen polar jacket is a fantastic all round flying jacket, I know because my wife and I both have one. It is a jacket that we tend to wear all the year round in this climate and is not too bulky to wear walking around the village either.