Only option is paying Diablosport to "reprogram" the programmer or find the car and either talk the new owner into allowing you to unmarry it, that is assuming the car has not been flashed by a dealer since it was sold, or sell the programmer to the new owner.
You can also put the programmer up for sale on the forum as long as you are clear it is still married. People do buy them if they can get a deal as they have to pay Diablosport to have it unmarried.