If you want to save a few bucks you can make your own quite easily. With a little speaker wire, white glue and some dried herbs you can make convincing 3d cammo branches for your vehicles.
you can see the three simple steps i take to make thes here http://uk.photos.yahoo.com/bc/brygray/rlst?.dir=/&.src=ph&.done=http%3a//uk.photos.yahoo.com
contact me via email if you want a step by step how-to.
hope this helps.