There is an electric powered 1967 Mustang JR on Ebay right now
Here is the sale
This is actually the Coval version made by the company that bought out the Powercar company. The frame is different but the body is the same.
Of course if you want a 1965-66 Mustang JR I have the original factory body molds from the Powercar company. along with many other reproduction parts,
I have been making a new steering wheel mold this weekend