When looking for a cheaper Crittall style doors for clients we usually first look on Direct Doors - they do standard and bespoke sizes and so many different styles at great price points https://www.directdoors.com/products/liberty-4-pane-black-primed-door-pair-clear-glass forgive me if they have already been mentioned above, I realise this was posted years ago so probably not much help now but may help someone else.
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Window seat and colour scheme
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