You can now get the Set from Treasure of the Distinguished Conqueror:

http://www.dota2.com/store/itemdetails/11424?r=ca

The first saw suit was insufficient in it's destructive prowess, as it's time on the battlefield had proven. While it's timber destroying abilities had felled many of those walking tree abominations, Rizzrack needed a new weapon that would make the forests howl rather than weep. Frantically prototyped and rolled out in a fit of creative rage, Lumberclaw will put it's predecessor to shame.