Here is a link to an excel spreadsheet for Nose Cones, over at Alibre forum.

http://forum.alibre.com///viewtopic.php?f=10&t=15008

Imported 12,001 points into MoI in 15 seconds, as polylines. Took about 3 hours in Alibre.
(This is way too many points.)
Ran rebuild in MoI with .0001 tolerance, for more manageable curve.