Floating lures are pretty easy. It is one of the easiest things to produce. Add enough micro balloons and you can make about anything float. The problem is getting the lure to the exact depth you want it.
Go to this link and go to the 3rd video down. http://makelure.com/HowTos.cfm Larry uses the new AlumiFoam to make some pretty indestructible lures for his precious wolf fish. I don't even think I'd want to catch one of those things! Although, the river him and Cesare were on looked awesome ... alright maybe I would.