You know you want the most accurate replica of Thor's Mighty Hammer Mjolner that you can find. And this, apparently, is it.
Googling "Clay Williams" (the artist) and "Eaglewood Sculpts" provides some social networking pages, but no official website. So I can't tell you how much 20 lbs. of oak, aluminum, and leather will cost you. But I'm sure it ain't super cheap to get a semi-custom Mjolner.