If you want to recreate the experience of watching a movie on HBO at 12:50 a.m. in 1991, Jim Mickle’s “Cold in July” is your movie. It’s not just that the movie, out on DVD this week, is set in 1989 and revels in its Bush Senior-era kitschiness, from star Michael J. Hall’s majestic mullet to co-star Don Johnson’s shoebox-sized car phone to, well, Don Johnson. It’s more the texture of the thriller, modest in scope, seedy and bloody and focused. They don’t make them like they used to anymore.