
Has anyone got a spare integrated coolant temperature and fan switch unit for a 2001 5JJ engine?
I know it's not the question you asked, but have you tried your local Yamaha dealer?
I've found tha while some things are daft money, some things are fairly reasonable - always worth a ring to find out.
I will be trying them sometime in the week I thought I would try here first.
i have a kawasaki one 
oooo look what i found - shame its in Euro's!!
linky!!
Suggests the part is about £35 anyway!!!!