Harmonic balancer fell off the other day. Finding a replacement isn't as easy as I was hoping for. None of the wrecking yards near me have one (well they do have some, but they won't pull it off of a running engine). Buying a new one isn't a problem, the problem is finding that little key. Anyone know the exact size key stock I need for it?

 

I guess I should add that it is a 1992 civic LX. Thanks