The costume was created in 1 week, as I luckily had most of the materials already, including the Worbla and leather (I hoard costume stuff O_O;). I only had to buy the brocade and the snaps. Some costume construction notes, if you are interested in that sort of technical stuff:
 

The jacket, belt and tails are made of the following: Brocade, 1.75oz Plonge leather, Denim for lining cuz it was stiff, Red pleather for trim.

I heavily altered a Victorian era jacket pattern for this jacket, as it had all the seam lines I wanted. Either make a mock-up, or, what I like to do is to make the lining first, do the alterations on the lining, then use THAT as the pattern for the outer layer with all the expensive fabrics. As a result, everything fit and the jacket is fully lined :)

The asymmetrical tails (not pictured here) were made freehand patterned and attached on a separate waistband.

I made the hood pattern based on trial and error, and the dang hood took over half as long to make as the jacket itself! After sandwiching a shaped foam piece between the outer hood and lining, it stood up! 

The jacket closes with a zipper, which the fat red trims hide. I then hand-sewed the frog closures on top for decoration. Time crunch only allowed me to find white frog closures, so I used fabric paint to make them red! 

The strappings are made of 6.5oz leather. I sealed the strap edges with Gum Tragacanth (lots of rubbing lol). Then I installed a crap ton of rivets, and each strap closes with a heavy duty snap. 

The armor and belt buckle are made of Worbla. I patterned and made Worbla armor pieces, then sealed them (you can use gesso, wood glue, filler primer or plastidip) and painted them with acrylic paint. I used D-rings and straps with Velcro sewn on to attach the Worbla armor! Attachment systems are super important for armor pieces! Take your time planning it out!