Well, I've been searching all over the internet for these songs to please my son.
He's a huge monster jam fan, and he wanted all the themes from the different monster trucks.
I think I got most of them, and thought you or your kids might enjoy them as well :)

This torrent contains the theme music for the following monster trucks

Maximum Destruction
Monster Mutt
Superman
Grave Digger
Avenger
Bounty Hunter
Blue Thunder
Air Force Afterburner
Taz
El Toro Loco
Captain's curse
Batman
Pastrana 199
An Escalade
Safe Auto Minimizer

and some opening songs they use to kick off the monster jam event 

Hope some of you may enjoy this!