Asiatam is selling them:

http://www.asiatam.de/index.php?cat=...7c6aa6642d1d1c

They still don't advertise the gearboxes in his site. I got the advice from this Panzerketten thread: http://www.rc-panzerketten-forum.com...threadid=12483

and the first images from http://modellbaukooperation1.privat.....de/laufp1.jpg

Cheers