Jim,
While working on my 67' last winter the same thing happened to me. Look at the attached image (sorry a little blurry) but the wire should be the same. The rubber grommet can be pushed back into the distributor housing and removed with the wire. I went to the local junk yard and found the exact gauge wire that included the 90 degree rubberized connector that clips onto the coil terminal. Then I took a razor blade and cut the rubber grommet off the original wire carefully so I could re-fit it in the proper position on the new wire. Then I took a knife blade and carefully removed the 1/2 moon wire connector on the other end of the wire and re-clamped it to the new wire, totally reproducing the old wire.
Hope this makes sense and works?
Jeff