This is true, but being proprietary they kind of have you by the short hairs.
IIRC IraqGunz posted one time that he thought he had figured out a possible replacement for the Enhanced bolt's springs.
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What I saw was that the extractor spring is actually an ejector spring which is about 1/3 the size of a standard one. The coil pitch and appearance looks the same. I dumped any and all LMT enhanced bolts simply because I don't want to deal with searching for proprietary springs.