I buy stock windows and doors from Menuiserie Industrielle.fr (SARL Michel Beze & Fils) but they are close to me so I can inspect and collect, to date significantly cheaper than Bricodepot and a much larger range of stock sizes, doors for instance in varios heights, the quality is far better with steel reinforced frames even on small abbattant windows which hinders me from cut n shutting them.
Their doors are by far the best I have ever installed, a 195 x 90cm full height glazed porte fenêtre norme accessibilité with wheelchair cill for €236 TTC. A chassis abattant 60 x 100cm for €118 TTC.
Granted the abattants were more than I used to pay but nobody else had that size or the door size in stock and they are far better than the Bricodepot ones I used to fit, that said they were OK if installed with care and have served their purpose.
Beze do delivery with a specialist transporter and it's probably viable for a multiple order.