Some more stuff that might interests you if you're new to sewing.
Familiarizing yourself with the tools. An example of an optional but very helpful tool is a compensating presser foot.
Example:
http://www.hobkirk.co.uk/images/pictures/industrial-parts/compensating-foot-right.jpg
This is very useful when trying to sew straight seams at an overturned edge, like the white layer on his jacket.
The lowered "ski" ensures that the seams holds the distance to the edge much more precisely than if you used a normal presser foot. They can vary in appearance between each sewing machine and many machines come with a variation of these, so have a look if you can find one. Keep in mind that there are both left and right turned ones, and that they fasten differently for different brands of sewing machines, so you'd have to know what machine you have if you intend to buy one.
Sulla's step-by-step Starship Enterprise uniform.
Enterprise Jumper Tutorial/Info in ENT (Star Trek Enterprise) Forum
A good tutorial and walkthrough that breaks sewing down to small steps. It's not the costume you're making, but some of the techniques might come in handy or give you ideas on how to solve some problems you run into along the way.
What bracelet are you talking about? I don't have the game so I can't have a quick look when he plays board games, and any search I make on the subject just gives me a lot of the hidden blade armlet.
Not that I think I'd be able to tell you exactly what it is, it just made me curious.
I also don't know much about getting metal replicas, but isn't it possible they won't let you walk around with one? Not trying to spoil the fun, just trying to help you not get in trouble.
Risu: Are you looking for the more basic swords or his family swords with the falcons? Depending on which it would be possible to perhaps make a good replica of the hilt part as well, it just needs other materials than the blade.