Well finding all of them can be a tricky job. It depends on how much you are interested in completing the task. Just keep following the points in your mind and your quest will become easy. Always ...

Drive southward along the road to the west of Wanted Posters #130 and #131. This one is due just south of where the previous poster was. You'll need a car to smash through the chain-link fence ...

There's a thin alleyway at the location we've given on the map, one that can be breached from either entrance to the north or south (you'll need a car to smash through the chain-link fences, however).