I need a digitized 1959 Chevrolet Impala as seen from the rear. Could anyone tell me where to purchase one?

http://sewingsupplywarehouse.com/...
has one included in a set.
Here is a free design of the front of a 59 Chevy Impala. Go to Cars page 2.
http://www.geothedigitizer.com/

Check out Embroidery Library. I'm sure they have it.