Wanted 1968 gts door panel emblems help!!!
Perhaps try:
Layson's
Wildcat Mopars (they will give you some vendor leads if they don't have it)
AAEmblems
Oldparts.com
stevesparts.com
tonysparts.com
Perhaps a nice member will check the Spring Fling and other places (Pomona Swap Meet, etc).
Just some quick stuff off the top of my head, but I figured some leads are better than none.