I really wish I knew, I have searched high and low for some but no luck (as I'm sure others have). I was even thinking about just trying to find the woodgrain material and making my own, heck, you could even use aluminum.
If I can get off my lazy butt soon I will try and make some patterns. I thought brushed aluminum would look sexy where the center bezel is along with where the arm rests are. I guess you could even create filler panels for the driver and pass side dash but that would take some work and I'm not sure how it would look. Just the center and door peices would be pretty simple though..
that's what i've been thinking too, about making my own. I think brushed aluminum would look cool. Then I just have too find somewhere to get aluminum.