
A steampunk kitchen is a challenge. Victorian kitchens were dark, hidden spaces not the center of a home kitchens are today. I recently ran across this kitchen in an early 90s design book --
Mary Gilliatt's Shortcuts to Great Decorating (the kitchen itself was designed by Pedro Guedes)and immediately thought it would appeal to steampunk aficionados.
What makes this kitchen steampunk, to me, is the wonderful woodworking and the cluttered "laboratory" feel of it.
The white marble counter top? Again, pricey, but available at most kitchen design places or even your big box home improvement stores. Apartment Therapy had a good article on white marble counter tops a while back.
Spending this kind of money on a kitchen doesn't quite strike me as a steampunk approach to things -- where's the reuse? Where's the do it yourself? If you like the look, I'd suggest a lot of patience and looking at unfinished furniture stores, Ebay and architectural salvage yards. I think you could create something with a similar feel -- perhaps with a commission to build a spice rack like the one towards the left in the picture -- with quite a bit of ingenuity.