Looking for a cheap (or free) small boom for land sailing.

[mjamero]

Do any of you have an old boom you can part with?

I'm thinking of putting together a mountain board to do some light wind land sailing.
The rig will almost certainly get dropped and scraped on the ground so I'm looking for something cheap that is OK to abuse a bit. It should be able to rig small sails.

Thanks for the reply.