Yes, the original Rosewood Palisander is now restricted, but I have used a beautiful African Rosewood substitute, also called Bubinga, from the African equatorial rainforests. I have reveneered a BeoMaster 1600 with this, as well as a new subwoofer, and it is stunning!
Bear in mind that the B&O color is not the original - it is stained with a dark red dye to give it that beautiful color.
You can see the restoration stages in this thread.
http://forum.beoworld.org/forums/p/10086/75098.aspx
Menahem
Learn from the mistakes of others - you'll not live long enough to make them all yourself!