I've played everyday since 1.07 came out, I've searched every type and tier of loot and I've asked other players if they've found them. I can confirm, at least on some official servers, that these new items are not spawning. It doesn't spawn the Repeater Carbine, .357 magnum rounds or the rubber slugs. Its really frustrating for me and my friends.

AP SY 0009

^ I think more servers are affected though.