There is a pair of webs where you can buy a model to enjoy the A350 in your desk at the office or at home. There are different dimension models and different finishing & painting liveries.
The Airbus web includes a shop with 6 different models:
From the cheapest 1/144 Revell Model with a kit of 120 parts to assembly by yourself (29€) to the biggest 1/100 Graphideco model (410€)
The other web page with many A350 models is: http://www.airspotters.com/ If you type A350 in the search box it will bring up a list of models. A Open Day is scheduled for 7/Sep and there will be online offers for those that cannot attend it personally.
Other online shops:
Enjoy your model, and if you know other webshops, please post it below in “comments”. Thanks.