Probably not. I have a 6 x 9 sitting on a table that I thought came out of the front of my 73 Dart. If I could find the frame I have, I know I could confirm it.
Even if it is a 4 x 10, there are lots of choices out there, more than you have listed. Just put "4 x 10 speaker" in a search engine (I tried it with Google). I found a number of top line speaker manufacturers that produce a 4 x 10 model.
