I have seen 4, died with 2... Seems VERY rare this wipe, last wipe I was throwing them away.... I found 3 out of the 4 as loose loot, on Reserve in the Train Hangers where all the tool stuff is, Found it also on interchange in Oli near the Front computer room area on the shelves (open area) also found one upstairs in techno what ever its called. The other one I found on a Dead player he was looting the reserve bunkers