I now know (much to my disappointment) that the scuba items are already in the Steam Workshop, but I've not yet seen the Hannibal mask nor a flower.
Since I've never touched TF2 modelling anybody is free to take these concepts and use them as they wish.
I like the flower :)
The flower seems to be a favourite, haha. It's been suggested that I add in a ceramic pot, too. :P