I was just given an old Ping driver head with a broken shaft.  I noticed that the ferruel had an unusual shape.  When I heated the head, the ferruel assembly came out and left a 3/4 inch hole in the neck of the head.  All that is on the bottom of the head is what looks like TISI Titanium Karsten 8.5 degrees.  Is there a sleeve for these heads that a .335 shaft would fit into?