Historic Pattern Help

I have several other content-rich things to write about, so of course I'm going to talk about coats.


Specifically, the coat on the right in the fashion plate there, the black one with the rose-red trim. Pretty, isn't it?

I yanked the image from Wikipedia, where it is one of the illustrations to the 1840s in fashion article. The source isn't given, but my guess is it comes from La Mode Illustrée, the Parisian weekly that began publication in the late 1840s.

Anyway, I want that coat. My knowledge of 19th-century clothing (and my ability to 'read' 19th-century fashion plates) isn't good enough for me to just wing it, though, so I'm looking for a pattern. The closest thing I've found so far is Butterick 5266 which, you can see, is close but not quite.

Any of you historical clotheshorses seen anything similar, or got better leads on patterns I could adapt? Historically accurate cut is good, but I'm mostly interested in getting something that looks like the one in the fashion plate.