----UPDATE----
I have uploaded the pictures of the main pattern pieces for the jacket to my scrapbook. Take a look if you are having troubles modifying your own pattern! (I couldn't find the pattern for the collar, I drew it on a piece of paper somewhere and I think it is gone now... sorry!)
---------------
I have had a lot of requests asking how I made the jacket for my cosplay, so I decided I would write a quick overview of what went into making it. I will not go into excruciating detail, but if you would like more help on any particular section, please leave a comment and I would be happy to elaborate!
STEP 1: Picking fabric
---------