I believe these guys supply many of the ones available out there:
http://www.quietride.com/ Look for "firewall pads". They do have an explanation page about materials and finish compared to original.
My 38 is a pressed cardboard material with a slight texture. I have a couple of them so thinking about maybe refreshing one of them since the new ones appear to be ABS and look almost too modern but we'll see. For the price I'd prefer something more original but it may match your year very well. The insulation on the backside gets pretty gross so I'll at least replace that.