Reiss do some. I recently bought the buster shirt (white) in their sales. It's a lovely shirt and the quality is brilliant, although it's sold out everywhere now.
Although having said that, John Lewis have it in a medium which I imagine is your fit judging from posts on this forum:
Buy Reiss Buster Plain Shirt, White online at JohnLewis.com - John Lewis
Zara are currently selling a collar bar shirt, but I'm not a fan of dobby shirts myself.
I think asos were also selling one, but since then they've sold out.
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