Making your own sluice box is not hard. It just takes a little elbow grease and some old fashioned determination to get the job done. Depending on where you live, you may even be able to piece one together using parts and pieces from a local hardware store, and that is exactly what this guy did. He made himself a highbanker. Take a look at his video. It does not show you how he made it, but it gives you a good idea of where you can start.