I saw these large signs at a major retailer and was a little taken back about how much they wanted for them. So, I bought a few boards and had a local lady cut a decal to use as a stencil. Literally about 3 hours later I had the sign completed to fit the custom space I needed.
Once the sign was assembled, I stained the boards a dark color, and then laid the stencil down. Painted over the top and then peeled back the stencil. This way the wood grain popped from the letters.
Hope someone gets even more creative and can add on to the idea.