Maybe have a look for local Menuseries & get a few quotes to compare, perhaps your Marie or the locals might have some recommendations. Certainly worth getting some other devis but bear in mind they are making bespoke windows for you so expect to pay for that. Depending on what you want & whether your windows are a standard size you could have a look at Brico Depot or Lapeyre, both of which are probably more affordable. Also Lapeyre offer a made to measure service. Hope this helps.