Well, I found a new spring, and did get it successfully installed. Thank you strk, for the exploded diagram and the instructions. The spring was not missing, it was there, but it was broken in half and somehow got folded over on itself rendering it useless. I would, however, like to quote Mr. BWilhelm here, "DO NOT DO NOT disassemble your safety unless you are willing to fiddle with it for hours trying to get it back together. Once you know the trick, it's easy but it takes a while to learn the trick....just leave it alone." Oh, it maybe isn't quite that bad, but it certainly isn't all that easy either.
"Though I've belted you and flayed you, by the livin' Gawd that made you, you're a better man than I am, Gunga Din"