Please take this advice. Before doing anything else I would call Bill at Millersound, a premier speaker repair person, for his advice.
Millersound Speaker Refoaming, Speaker Reconing and Repair Services
If he suggest reconing the speaker, then you have to decide whether to obtain a new cone directly from Klipsch for him to install or using what he uses (which may be from Klipsch for all I know). I would definitely want an "official" Klipsch cone.