There's a new TF2 update. Apparently the community made poly pack is going to be sold ingame, each item individually, from .99 - 5.00. I'm not gonna buy anything personally, seems like a waste of money. Apparently, "Some cosmetic items can never be found or crafted, only bought." Which leads me to believe that the new poly count items do drop, but their drop chance is very, very small, otherwise there wouldn't be a reason to sell em.