I just replaced my blades 4 days ago in my 2002 jouney, I wouldn't replace the rubber inserts. just take the whole blade down to the auto store, O'riellys, pepboys etc. and get replacements. Mine were two 24 in.. I paid approx. 11-12 apiece. for the upgraded ones.. they started about 7.95. apiece,
simple single bolt in the middle replacement done and finished in about 5 minutes per blade.
No messing around trying to fish in a rubber replacement insert.
Probably not as same as yours, but unbolt the whole blade from the arm.
2002 Winnebago Journey DL 34 ' Cat. 330 hp
Great wife and Charlie, Cavalier King Charles Spaniel RIP