Reasons why I don't want the original cap any more:
1. It has an integral failure method.
2. It requires a key.
3. It gets in the way when I fuel the tank.
Reasons I don't want a replacement removable cap:
1. It doesn't require a key (which prevents tampering and gas theft, the former being more likely and dangerous)
2. It doesn't stay captive (I WANT it hinged so I don't have to figure out where to put it and don't risk scratching the paint)
3. Might not match
But who knows- if I get frustrated enough I might, anyway.