Update for a replacement OEM radiator fan. I found an R6 fan used on Ebay for $50 USD from :
goldrivermotorsports , shipped cheaply to Blaine, WA for pickup in 2 days. The R6 fan motor is physically identical to the S10 part, but the fan itself is smaller diameter. I simply swapped the fan and the Tenere electrical connector and reinstalled. I've been running it now for a few hundred kilometers in temps up to 35C and it's working as normal. Fan comes on at 105C coolant temp. and off at 100C in a few minutes. I'm a happy camper!
Thanks to all members for their help.
This subject of rad damage begs the question of upper crash bars. I have the accessory OEM crash bars and they have proved their worth protecting the engine side cases. I would love to hear from anyone who has found or fabricated upper bars to protect the fan, plastics, etc., that work with the OEM crash bars. I will probably fabricate a solution this winter if I find nothing else. Ride safe. M