I am having trouble locating a pair of replacement external doors. I want a pair of 18" wide doors to replace the existing ones. Looking for wood/ double glazed. Any suggestions for supplier? Have been quoted high prices for bespoke doors but I am convinced I can get this size off-the-shelf somewhere (but which shelf?). Have looked through many standard door catalogues and usual DIY stores without success, all "standard" double doors seem to be wider than mine,
Philip