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Yeah I don't want to get too Patrick Bateman about a white shirt but these are very well made. I've spent many an hour in TK Maxx and never found anything that comes close although they do get a fair amount of Ralph Lauren (classic & custom fit).
If you can get down to a Drakes sample sale, buying three OCBD's for £150 (iirc) is very good value for money. They're what I wear most days.
Unfortunately this is where this thread goes over my head.
To me that just looks like a standard work shirt. I'd go to Lewins and see what fits best.