The part in question is a convex mirror about the right size. I have ordered one from my local JD dealer to see what they look like. Cost is $37.05 plus appropriate gouge and screw taxes!
Part number AT186760 (old part number RE52660)
Interior Rearview Mirror Tractor model 2955
Catalogue section 92-5E20. Catalogue URL is:
http://jdpc.deere.com/jdpc/servlet/c...ageServlet_Alt
George- Thanks for pointing us carrier nuts in the right direction!
Mike