I think the set could have been made. The Motorola 19 inch sets from 54 are on very small weak legs, and I don't think it would be any problem to run the HV leads for several feet. We do it all the time when we are using a test jig.
http://www.earlytelevision.org/motorola_19ct1.html
As to whether it was sold to the public, I doubt it, but I think they may have had a set on display.