The lenses from inexpensive black-back fog lights like those shown in this auction will work in the chrome-backed units.

Lucas Lights (http://cgi.ebay.com/ebaymotors/Mustang-Shelby-Lucas-Fog-Lights-1968-1969-1970_W0QQitemZ330260482362QQcmdZViewItem?hash=item 330260482362&_trkparms=39%3A1%7C65%3A10&_trksid=p4506.c0.m245.l1318)

Does anyone know if the wire pigtails on these plastic lights are identical to the originals that are found on our Mustangs?

Does anyone know if the wire pigtails on these plastic lights are identical to the originals that are found on our Mustangs?

Not sure about the pigtails but the threads on the bolts are different.