Where can I find a wood bar top for a custom bar?

I would like to match the bar top to wood flooring we plan to put on our stairs, as well as to open shelving (to hold liquor) against the back wall. I haven't purchased anything yet, but know I want a dark wood. Would like a good price, and close match. The bar top only needs to be a straight 6 foot piece (approx) and about 12" deep - it is to complement the granite lower level. One side edge should be straight, the other possibly bull nose. I can't find this at Lowe's or similar stores, but maybe I'm not looking in the right area. I would like to keep the price down, but like the real wood that won't warp over time, or cause other problems. Thanks in advance!