TMPV - Vehicle pack copyright issues

The exact quote from Epic is “All models seem to be replicas of real live vehicles. The models require significant changes to the shape and proportions.” I spent over 5 months working on the pack and it would be super bad if I can’t make at least a little bit of profit on it. What exactly do I have to do to fix the models? I modeled them using real vehicles as bases without realizing that was a bad idea. Any help on how I can fix this problem would be life saving thanks! (Ps don’t know if this is the right place for this sorry)

(Here’s a link to renders of the vehicles )