The specs on the CD Board are pretty sparse for the Intrepid 40. I did see a reference that the I40 used Thordon Longlife bearings. I checked their website and they don't have the size specs for their yacht-size bearing line (some of their ship bearings are so big I could stand inside one!!)
Here is the contact information for the company that provided the original equipment:
Thordon Bearings, Inc.
3225 Mainway, Burlington, Ontario L7M 1A6 Canada
Tel: (905) 335-1440 Fax: (905) 335-4033
E-mail
info@thordonbearings.com
www.thordonbearings.com
Their website also has an emergency number with contact info:
FOR EMERGENCY
AFTER-SALES SERVICE
Call: +1 905 335 1440, ext. 7
E-mail:
service@thordonbearings.com