Here's a link to the complete kit that he offerd on evilbay for the Bruder D10 conversions.
http://www.ebay.com/itm/bruder-dozer...ss!98032!US!-1
Since I already had Sabertooth 2X5 laying around, as well as a few servos, I opted to buy the tracks, sprokets, & bearings from him, rather than the whole kit.