I doubt that will happen. How long's it been since the vinyl capes were produced by Kenner? Far too long. And Kenner's old replacement policy is no longer in effect since they were bought out by Hasbro. Not that it would be in effect anyway this late after the fact. As for ordering, it would be far too easy for people to have a "perfect" collection if the company allowed orders of replacement parts for their old figures. That would drive the value of these figures so far down that the allure of collecting them would be gone.

I say try your local comic book store. You never know what you'll find there.