At a recent friend's wedding I bought a 1940's inspired dress from a charity shop and teamed it with seamer tights and a faux flower which I wore behind my ear:
My poor old sister had a time taking any photo of me that was half decent because at this point I had had two glasses of Pimms and thus was feeling a little silly! But I think you get the gist.
So now I am inspired to buy more 1940's style clothes and have been scouring the internet to see what I can find.
Found this website vivienofholloway which has some pretty cool stuff, but it is a bit pricey: