Looks legit huh? It's for sure has to be a custom someone did. As for the e-mail response, here is it:
"Thank you for your email. I am sorry for the delay in replying to you.
I have looked into this matter for you and have unfortunately I have not been able to find any information on a ‘Hot Wheels’ promotion.
I can see from doing some research that in the 70’s it appears that Dinky did a couple of Ovaltine cars / vans but I cannot find any reference to ‘Hot Wheels’."
Are you surprised? If not, you should be! If you know anyone with this Mustang, please let them read this information!