It might be a bit late for this purpose, but in Europe we have a paper called Woodside. The frontside looks like wood, the reverse side is a plain light brown kraft. In comes in one size approx 40×28″ and two substances: approx 80t and 145dtc.
It can be printed in offset, letterpress, foilprinting and screenprinting, but be aware that the surface is rather hard and will not easily give a deep impression.
Any questions, just let me know. We can ship smaller sizes as well.
Christiaan