Looks like there used-to-was about seven of 'em:

Original Release
- some browned cowrie shell armor (originally 3x brigandine, now 6x, 49/325, 24lbs, currently owned by Mijunkin)

Foehn's Promise '05 Auctions
- some browned cowrie shell armor (3x chain hauberk, 49/325, not enchantable, won by Saltstone)
- some striated conch shell armor (3x brigandine, 49/325, reportedly enchantable by wizard or merchant, won by Elegance)
- some lobster shell armor (3x half plate, 49/325, won by Kaelael)
- some bowed crown shell armor (3x double chain, won by Azaton for 4 million)
- some spiked crab shell armor (3x leather breastplate, 49/225, won by Bloodthorn for 4.6 million)
- some swirled abalone shell armor (3x double leather, 49/325, won by Neox for 4.5 million)

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Anyone know if any of them (the armors, don't care about the characters) are still extant?