It depends on whether you want to spend hundreds or thousands. For maybe $250 to $300 you can buy some nice sheepskins and some foam to go underneath. Foam comes in different densities and different thicknesses (1/4", 1/2" etc). You can laminate it with spray contact cement and attach it underneath the sheepskin with the same. You can carve it up with a kitchen carving knife into any shape you want - just a matter of how much time you want to spend on it. The biggest investment is the sheepskins - which I happen to like but not everyone does.