Turns out I already had the clothes to cobble together a Ramona Flowers outfit, but the main part was making the giant hammer. What started off as a cardboard box, a brush handle and 3 rolls of silver tape was knocked together to make myself a giant hammer.
I was quite happy with how it turned out. I also made myself a star handbag by drawing a star on some extra cardboard and taping it to a blue bag I had (you can see it in the photos below).
So here are some photos of me from the nights, I'm very happy with how it turned out.
Attempt at Ramona's hair with long bits at the front.
And here's the photo of Ramona I was going for, in case you have no idea what she looks like.