You are in luck.....check this out; http://omaha.craigslist.org/ptd/3761185700.htmlFacebook: https://www.facebook.com/JestersHydrographicsAndDesign?ref=ts&fref=ts
Maple Creek Gunsmithing in Fremont has a guy that does it for them and seems to do nice work.
Hello, I'm the "guy" that does the dipping for maple creek gunsmithing you can check some of my work on facebook Bandit Taxidermy & Hydrographics
I think Wallace11bravo does it, in Lincoln, but he is off the grid in training right now