The jacket is a bit of a pain to find one that looks good and not costume-ish. I've been looking for one that I could wear on regular occasions and not just for costume.
Here's a picture of the actual jacket used in the film. What I'd suggest is getting a cheap dark grey blazer in that style with the black collar thing and then use some silver fabric spray paint and maybe some gloss paint too.
View attachment 636107
Not sure how this'll work on a blazer, but...
https://www.amazon.com/Rust-Oleum-248926-Automotive-11-Ounce-Fabric/dp/B003CT4AUC