Heh, before reading this thread, I ended up doing the same thing... I used Jenova to put some Star Crystals (is that what they're called? Comet2 on all opponents) into my inventory, then used them with Cloud.
Looking at young Cloud and Sephiroth's inventory, both of them had "t Vest" (as in, Protect Vest) listed as their weapons.
Btw, the link that was posted as a solution brings a 404 Not Found message.