I really messed this one up. I decided I'd go with a quick and dirty photo texture job. I left the UVs as they were, which made my occlusion bake go nuts, took 5 minutes to fix that. Most of the pictures I used came from cgtextures.com. Ended up spending way too long on the diffuse though, some 80 minutes, this meant I had to basically collapse, desaturate and select some white areas to make my specular map in 30 seconds and that left me with 10 minutes to hack together a normal map using the nvidia photoshop plug-in. I'm pretty sure the lack of time on the NM and Spec maps brings down the whole, but oh well, live and learn.
Rendered in mental ray with physical sun and sky as I didn't have time to make a nice light setup. Textures were made in 2048 and scaled down to 512.
image comp of renders
maps