If you can't find anyone local to do the cork handle restoration you might consider shipping the handle senction to Ken Prager ( http://www.whiteclayoutfitters.com/m_17.asp?pa=m_17
) . Ken is a custom rod builder and does very good restoration work. His pricing for restoration work is very reasonable and less than you might expect.
If you decide to replace the grip yourself you might look at the butt section and consider removing the old handle/installing the new handle without removing the reel seat. You can do this quite easily if there are no line guides between the handle and the butt section's tip--often true on 4 piece rods.