I've also been messing with Locke's costume as of late.
The left version is modified from a sweater I got when I lived in Barcelona. I like it because it is more fitted around the waist and that band on the bottom with the two buttons that are off center. (On the down side, it's really scratchy and you can't wear it with short sleeves.) The right hand image is, as you might have guessed, taken from one of Amano's sketches. I really like the color of that one- I guess it counts as a sort of dark grayish-purple.
I had originally intended to keep these for TWC vote incentives, but then decided I'd share them here. You can still find the full versions on TWC this coming Wednesday and next Wednesday.