Club Obi Wan

I want to try reblocking this leather "Indy" hat for my mom. Anyone have any ideas what I could use for a block?

I want something that I can find for really cheap, but will stretch the hat out.

Small trash can / waste-paper basket maybe?
Doesn't Pagey have a block made of cement?

Don't rule out the pot and pan collection for a very straight block. Assorted sizes too!

I used a piece of long cardboard rolled up in an oval/cylinrical shape once.