I have this in my "Save" files ........

1 quart 3% hydrogen peroxide (any drug store or WalMart)
1/4 cup baking soda
1 teasp. liquid soap
Mix and use to shampoo any pet or person. Rinse with plain water.
It won't "keep" and can't be stored.
.................................................. ..
http://www.cleanuppages.com/clean/skunkodor.htm
http://www.pacificresources.com/ff-termo.html
http://www.havahart.com/nuisance/skunks/skunk_odor.htm
...............................................
I haven't tried these URL for ages so I have no idea if they are still any good.
I know our Missouri Magazine was also suggesting this recipe.

Good luck with whatever you use