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There are at least 2 things to consider here:
1) That very connector includes the chip that tells your MacBook if the brick has 45, 60 or 85W output power. So, despite similar look, the MagSafe connector is brick-specific. I have no info, if that data could be coded into chip by the end user.
2) There seems to be no way to open the brick so that it doesn't suffer cosmetic damage.

Check this for more info: http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html
https://www.ifixit.com/Guide/Repairing+Apple+AC+Adapter+Broken+Cable/20434
 
Good Lord! That's more than I wanna do. ; Thank you for that link. Not so simple, I see. Yeah, I'll just keep buying replacements. I wish Apple would make these so they don't fray at the connector.
 
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