Hi Lillian Torres Metevier! Is 64" size of the door without a jamb width? For proper installation of the door, you need to leave additional 1/2" to 3/4" gap. Most stores that sell double front doors indicate only the size of the door itself without jamb, so it may be a solution.

yes is 64" without the jam. Each door measures 32"

In these case, you can contact store or manufacturer of a door you like and purchase a custom door with your dimensions. Most of them do so.

If your doors are in good shape, you may want to consider adding a Wrought Iron Door Glass Insert rather than replacing the doors.

Here are a few transformations on 8 foot doors: