The TT Chess boards are available at SL's marketplace and in-world.
Please note that i am outphasing the TT2xx series. The TT2xx 2D are succeeded by the TT500. The TT2xx 3D series will be succeeded by the TT600.
Marketplace: https://marketplace.secondlife.com/stores/45155?id=45155
In-world: http://maps.secondlife.com/secondlife/Virtual%20Reality/189/24/22