Murat - If you'd like a historic capote you might want to look for the old Fleur de Lis patterns from Sussane Gouse. I don't think the company is currently in business but their patterns are still available; although sometime difficult to find. They specialized in 18th century French clothing and one of the pattern sets they sold had the capote, along with other men's clothing, as part of the set. If you know any re-enactors that are on the French side, they might be able to help you find the pattern. I'll see what I can find and will shoot it your way if I do.
That being said, if you're willing to move into the 19th century, those capotes tend to be a bit more boxy. Essentially you're cutting out long rectangles and then sewing them together. I'm not much of a sewer (have never gotten the hang of a machine so all I do is hand sewing) but I made a nice wool overshirt that is essentially a pull over capote without the hood. It wasn't as difficult as I expected it to be. Although the project seemed overwhelming at first I decided to take it one seam at a time. With that as my strategy, that's exactly what I did. After I cut it out I sewed exactly one seam every night and then put it away. This kept me from getting frustrated and allowed me to go with the shorter seams first so I'd be ready for the longer seams in the body. Anyway, two weeks after I began I had a great (and very warm) wool overshirt that I've used on lots of late fall and winter trips. The old "slow but steady" strategy really worked for me with this garment so I'm sure you can do it as well.
That's all for now. Take care and until next time...be well.
snapper