Turned parts for the the 40mm diameter, variable length, 18 slot Powercroco do-it-yourself outrunner motor are available from Sandra:
www.croco-power.com -> shop -> (English flag) -> Croco parts
Discusssion and tips:
www.rcgroups.com/forums/showthread.php?t=392627 www.flyelectric.ukgateway.net -> Crocodile motors
www.powercroco.de 'bible' (featerurs also powercroco designs for directdrive mainmotor helicopters)