The only place I have seen them for sale is in Germany.
I happen to work there so its easier to order one and less for postage.
https://rc-car-online.de/de/products...olybutler.html
I have the red/black version but it has the bottom drawer missing like this one on Ebay.de / Ebay.com - there is one for sale on there now.
http://www.ebay.com/itm/Schubladenko...cAAOSwKtlWnUj7
Hope that helps ?