Heck. You can make those. Ally ya need is a pie tin, some plastique, big bag o' ball bearings, a detonator, some wire, a battery, some wood, some string, some duct tape, and a clothes pin. Makes a good "craft" project for the kids. "Darlin', thats a wonderful directional mine you made, but "Front" goes on the side with the ball bearings."
For that matter you can make functional equivalents to LAWs & RPGs too. If you have the right tools and materials ( I wonder if that comes under the heading of model rocketry?)