saw these 170mm Mavic crank arms on Australian ebay ....
http://cgi.ebay.com.au/MAVIC-SSC-I70MM-ROAD-CRANKS-RARE-AS-THE- ULTIMATE_W0QQitemZ220234276957QQihZ012QQcategoryZ56195QQssPageNameZWDVWQ QrdZ1QQcmdZViewItem
or item # 220234276957
I know the seller (kinda) and am happy to pick them up for any CR listers and mail them at cost (just let me know).
I'm posting this because I'm trying to avoid buying them and then chasing all the other necessary parts to build a "tout mavic" bike.