The jacket with the vertical pocket did make it into the film - several versions (all meant to represent the same jacket, narratively) are seen on screen. None of the film-used black jackets are still available, though some close ones can be found.
The grey jacket which supplied the arms, collar, cuffs, and waist actually never made it to stores to begin with, as it turns out. It was from a limited run of prototype jackets which Topshop must have supplied in response to the costume designer's request for varsity and bomber jackets. Courtney Hoffman and Edgar Wright must have really liked the Topman jackets' look, the way they fit Elgort, and the ridge detail on the ribbed material, because they made the concession to cobble together less consistent jackets in order to use them.
We have one of the prototype greys and one of the original black jackets; I'm supplying Zlurpo and Indy Magnoli with reference to make replicas. They both do nice work, though I believe Zlurpo's already conceded that his won't feature the ridges on the ribbed waist and cuffs. I know Indy often gets into more custom weaves/materials, and I'm hoping he might pull that off on his version. I expect the two will have prices which reflect that difference to some extent - there should be a replica for everyone's budget soon enough. For what it's worth, I'd avoid those eBay jackets. They look wrong in so many ways. It's one thing to lose the ridge, another thing entirely to have it fit and hang wrong or to use navy in place of black, IMO.
Indy & Zlurpo, I owe you some "whole jacket" pics and broad measurements - I'll get those to you this week!