The question is, who owns the (rights to the) Radar single today? The Radar label folded like 40 years ago.
In any case, the Radar version of Tar is very similar to the LP version, and the 12" Version of Frequencey 7
is also similar, albeit (much) longer than the Radar 7" version. And finally, there would not have been room
for them on the CD. So I think Rubellan made the only logical (Spock) and possible choice, to leave those two tracks out.
But the mystery remains, who owns them now?
http://www.discog.info/visage-discog.html