Well, I didn't find anything there, I guess my level is too low (and I haven't done "Life During Wartime" yet).
But you (and everyone else) can check my findings, they are just regular, ordinary Mackinaws.
The first one I stole from a Valentino gang around the corner from Delamain HQ (turn right at the travel point and you should see it), in front of "Barstow Enterprises" and "Megapax Export". Coords: x: -859, y: -37
The second was near an assault in VistaDelRey, not far from the first location. On the waterfront at the "Brainwash" Pachinko corner, between travel point "Shooting Range" and "2nd Amendment" gun store. Coords: x: -953, y: -803
I got the third one during the Epistrophy mission in Wellsprings. At the time, there was a car accident between a Mackinaw and a Mizutani Shion at the junction under the bridge, police and all. After the collision with the Delamain, my car was badly damaged, so I took the Mackinaw instead. (A bit difficult to replicate because there is usually no car crash at this point). Coords: x: -2162, y: -1132
If you have Cyber Engine Tweaks installed, you can enter the coords, e.g.: Game.TeleportPlayerToPosition(-859, -37, 10)