How could i find a really old army truck or jeep?

have you ever seen the demolition derby episode of viva la bam? where the winner of the derby won the old army truck? i think that would be awesome. i probably couldn't afford one if it was working, but I'd like to try and i may have some connections that could fix it up. if you can tell me what type of place i should search for that'd be cool, but if you could actually tell me a place around the Shenandoah valley VA, that would be even better.