Large piece of card (West Meads PO21)

Will accept cardboard or a large box…I have to make a mr men costume by Friday 🙈 I’m fairly good at drawing and painting but wondered if anyone had one or two pieces of large card or cardboard I could use for this?

Ideally in the Bognor Regis or adjacent areas due to very short timeframe 🙈 Please and thank you!