You can get the first one in chapter 1 and will get it if you are going for 100% completion anyhow. In Macalania Woods talk to Tromell 4 times, the fourth time he'll give you Paine's Full Throttle dressphere and the trophy unlocks then.
If by chance you did miss it in chapter 1, from what I recall Tromell will still give it in chapter 2.