Yes.
After some delay, we do now have a limited supply of wooden Tai Chi Balls available:
http://ymaa.com/publishing/balls/taichi (arriving July 2)
These are hand made individually from kiln-dried laminated wood, then finished with a natural wax and packaged in a reusable box.
The Beginner Ball is 2-3 lbs, 6" diameter, made of poplar.
Intermediate Ball is 4-5 lbs, 7” diameter, made of red oak.
Advanced Ball is 7-8 lbs, 8” diameter, made of oak, with a darker stain.
The process of making a Tai Chi ball out of wood is difficult and poses several technical challenges. But we have found the best available source, made in the USA. These balls are made by gluing several pieces of wood together, which reduces the tendency of the ball to crack as it ages and dries. The traditional method of making a ball from a single piece of wood is difficult to accomplish, and can't be done in bulk or for an affordable price.
Those interested in "internal" training will need to work a bit harder to pass their Qi through the wood and glue, although you may hold it sideways also.