I thought something smelled bad. It usually does with FDM stuff. On this page of his website he uses these mounts for all "his" converstions:
http://www.finedesignrc.com/ct-finedesign.asp
On this page he claims they are "FDM Alum. motor Clamp mounts":
http://www.finedesignrc.com/ct-1-8scaleparts.asp
On this page he claims they are "FDM Custom Motor Mounts" for the HPI Savage. I am assuming they are the same. No picture but look at what he uses for all his converstions:
http://www.finedesignrc.com/ct-hpi-hotbodies.asp
Interesting.?.