I believe this car is built upon the chopped up chassis of a production economy car. It is not an original design. Except for the height of the belt line, it has the silhouette of a Chevy Monza.
I also believe there is only one car, it has been painted silver & more recently blue. I have not found a picture of a red version, nor have I found a picture of the two side by side.
below are some pictures from the 'net
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